Free Online Tools - All Digital Utilities

All Implemented Digital Utilities (226 Tools)

PDF Tools

Manage, convert, and edit PDF documents directly in your browser without uploading sensitive files to remote servers. Merge multi-page files, split documents, compress file sizes, and reorganize pages securely with zero wait times.

Merge PDF — Combine multiple PDF documents into a single organized file in seconds.
Split PDF — Extract specific page ranges or split every page into individual PDF files.
Compress PDF — Reduce PDF document file size while maintaining crystal-clear text and image clarity.
Extract PDF Pages — Select specific individual pages or custom ranges to create a fresh PDF file.
Reorder PDF Pages — Rearrange, reorder, and shuffle the sequence of pages in your PDF document.
PDF Page Numbering — Add custom page numbers, headers, and footers to any PDF document.
PDF Crop — Crop PDF margins and trim white borders from pages for cleaner printing and viewing.
PDF Resize — Change PDF page dimensions to standard sizes like A4, Letter, A3, or Legal.
PDF Metadata Remover — Strip hidden author names, creation software, GPS data, and edit history from PDFs.
PDF Password Protect — Encrypt your PDF document with a secure password and restrict unauthorized access.
PDF Unlock — Remove password security and permissions restrictions from PDF files you own.
Compare PDF — Compare two PDF files side by side and highlight visual and textual differences.
Rotate PDF — Permanently rotate all pages or specific pages by 90, 180, or 270 degrees.
Delete PDF Pages — Remove unwanted or blank pages from your PDF documents easily.
Watermark PDF — Add custom text watermarks with custom opacity, rotation, and colors to your PDFs.
JPG to PDF — Convert multiple JPG, PNG, or WebP images into a single clean PDF document.

Image Tools

High-performance client-side image editing and format conversion suite. Compress JPG, PNG, and WebP assets, resize dimensions with aspect ratio locking, crop visuals, and generate multi-size favicons with local browser processing.

Compress Image — Compress JPG, PNG, and WebP images with adjustable quality controls.
Image Resizer — Resize JPG, PNG, and WebP images to custom dimensions with aspect ratio lock.
Image Format Converter — Convert images seamlessly between PNG, JPG, and WebP formats.
JPG to WebP — Convert JPEG photos into modern lightweight WebP format for fast web loading.
PNG to WebP — Convert transparent PNG graphics into lightweight transparent WebP files.
WebP to JPG — Convert WebP images back into universally compatible JPEG photos.
WebP to PNG — Convert WebP images to lossless PNG format with transparent alpha intact.
GIF to JPG — Convert animated or static GIF files into high-quality JPEG photos.
GIF to PNG — Convert GIF images into transparent PNG graphics with sharp edges.
Image Cropper — Crop photos to custom dimensions or standard aspect ratios like 16:9, 1:1, 4:3.
Image Rotator — Rotate photos by 90°, 180°, 270°, or any custom angle with live preview.
Image Flipper — Mirror and flip images horizontally or vertically in one click.
Image Watermark — Add custom text or logo watermarks to protect your photos from unauthorized use.
Image Blur — Apply Gaussian blur to entire photos or censor sensitive regions.
Image Pixelate — Turn photos into retro pixel art or censor sensitive details with mosaic blocks.
Image Metadata Remover — Strip EXIF GPS coordinates, camera model, and timestamp data from photos.
Image to Base64 — Convert images into Base64 data URI strings for embedding in HTML and CSS.
Base64 to Image — Decode Base64 strings and data URIs back into downloadable image files.
Favicon Generator — Generate standard multi-size favicon packages (16x16, 32x32, 48x48, 128x128).
Color Palette Extractor — Extract dominant color swatches, HEX, RGB, and HSL codes from any photo.

Video Tools

Browser-based video inspection and quick media transformation utilities. Extract high-resolution still frames, convert video clips to animated GIFs, calculate display aspect ratios, and inspect container metadata entirely on your device.

Video Frame Extractor — Capture crystal-clear, full-resolution still photos and frames from any video file.
Video to GIF — Convert short video clips into high-quality animated GIFs with custom FPS.
Trim Video — Cut and trim video clips to your exact desired start and end times.
Extract Audio from Video — Rip and extract the background music, voiceover, or soundtrack from video files.
Video Thumbnail Generator — Create professional video thumbnail covers with text overlays and custom aspect ratios.
Aspect Ratio Calculator — Calculate proportional pixel dimensions for 16:9, 4:3, 1:1, 9:16, and custom ratios.

Audio Tools

Web Audio API utilities for sound synthesis, inspection, and acoustic measurement. Generate precision pure tones, calculate BPM and musical pitch shifts, synthesize ambient white noise, and visualize audio waveforms locally.

MP3 Converter — Convert audio files to standard MP3/WAV formats with adjustable bitrate.
WAV Converter — Convert audio tracks to uncompressed, studio-quality 16-bit/24-bit PCM WAV audio.
Audio Compressor — Reduce audio file sizes for voice notes, podcasts, and web streaming.
Trim Audio — Cut songs, trim silence, and create custom mobile ringtones with live audio playback.
Merge Audio — Combine multiple songs, sound effects, or voice recordings into a single track.
Extract Audio — Isolate and save audio streams from video recordings and multimedia files.
Change Audio Speed — Speed up or slow down audio playback from 0.5x to 2.0x without pitch distortion.
Audio Waveform Generator — Visualize audio amplitudes and export stunning waveform graphics for social media.
Online Tone Generator — Generate pure sine, square, sawtooth, and triangle audio frequencies in real-time.
Audio Inspector & Metadata — Inspect audio sample rate, bit depth, channel count, duration, and container codec tags.

Document Tools

Practical formatting, editing, and conversion tools for everyday document workflows. Draft and preview Markdown with syntax highlighting, convert HTML to clean formatted text, extract file contents, and compare text differences side-by-side.

Markdown Editor & Live Previewer — Split-pane Markdown editor with live HTML rendering, table formatting, and export.
Markdown to HTML Converter — Convert GitHub Flavored Markdown into clean, semantic HTML5 code.
HTML to Markdown Converter — Convert HTML webpages, articles, and rich text snippets into clean Markdown format.
Text & Document Diff Checker — Compare two text snippets side-by-side or inline to highlight additions and deletions.
Lorem Ipsum & Dummy Text Generator — Generate placeholder filler text in paragraphs, sentences, words, and list items.

Text & Writing

Comprehensive text transformation and copywriting utilities. Count words and characters in real time, adjust letter casing, deduplicate lists, sort paragraphs, and strip unwanted whitespace instantly.

Word & Character Counter — Calculate real-time word count, character count, sentence count, and reading time.
Case Converter — Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.
Text Cleaner & Formatter — Strip extra whitespace, remove HTML tags, deduplicate lines, and format text.
Remove Duplicate Lines — Deduplicate text lists, delete repeated lines, and keep unique rows in seconds.
Sort Text Lines — Sort lines alphabetically (A-Z, Z-A), numerically, by length, or randomly shuffle.
Reverse Text & Words — Reverse text characters, flip word order, or invert line order instantly.
Text to Slug URL Converter — Convert article titles and headings into clean, SEO-friendly URL slugs.
Character Frequency Counter — Analyze letter and word frequency distributions with visual bar charts.
Markdown Live Preview & Editor — Write Markdown with real-time rendered HTML preview, tables, and syntax export.
Text Diff Checker — Compare two text documents side by side with highlighted additions and deletions.
Lorem Ipsum Generator — Generate placeholder paragraphs, sentences, and words of standard dummy text.

Developer & Code

Essential daily utilities for software engineers, web developers, and DevOps teams. Format and validate JSON, decode Base64 and JWT tokens, test regular expressions, and generate cryptographic hashes with zero server latency.

JSON Formatter & Validator — Beautify, minify, validate, and repair JSON data with syntax highlighting.
JSON Minifier — Compress and minify JSON by stripping all whitespace and line breaks.
JSON to CSV Developer Converter — Convert JSON arrays and objects into structured CSV spreadsheets.
CSV to JSON Developer Parser — Convert CSV spreadsheets into clean JSON arrays and object structures.
XML Validator & Formatter — Validate XML syntax, format tags, and detect unclosed or mismatched elements.
YAML Validator & Formatter — Check YAML syntax, validate indentation levels, and convert YAML to JSON.
HTML Minifier — Minify HTML markup, strip comments, and remove redundant whitespace.
CSS Minifier — Compress CSS stylesheets, strip comments, and remove unused whitespace.
JavaScript Minifier — Minify JS code, remove console logs, comments, and extra whitespace.
URL Parser & Builder — Parse URL protocols, hostnames, path segments, and query parameters.
HTTP Status Code Reference — Interactive dictionary and lookup tool for all 1xx, 2xx, 3xx, 4xx, and 5xx HTTP codes.
Base64 Encoder / Decoder — Encode and decode text strings, binary data, and files into Base64 format.
JWT Token Decoder — Decode JSON Web Tokens (JWT) to inspect header algorithms and payload claims.
Cryptographic Hash Generator — Generate SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic checksums.
Regex Tester & Debugger — Test regular expressions with real-time match highlighting and capture groups.
Unix Timestamp Converter — Convert Unix epoch timestamps to human-readable dates and UTC times.

Web & SEO

Search optimization and webmaster utilities designed to streamline site configuration. Build Google-compliant Schema.org JSON-LD, generate Open Graph social cards, construct robots.txt rules, and track campaign links with clean UTM builders.

Meta Tag Generator — Generate essential SEO meta tags including Title, Description, Robots, and Keywords.
Open Graph Generator — Generate og:* tags for rich link previews across Facebook, LinkedIn, Discord, and Slack.
Twitter Card Generator — Generate twitter:* card meta tags for high-engagement link previews on Twitter / X.
Robots.txt Generator — Interactive robots.txt builder to configure crawler access rules and sitemaps.
Sitemap XML Generator — Create clean, valid XML sitemaps for search engines from a list of URLs.
Canonical Tag Generator — Generate rel="canonical" link tags to prevent duplicate content SEO penalties.
Hreflang Tag Generator — Generate multi-language and regional hreflang tags for international SEO.
FAQ Schema Generator — Generate Google FAQPage JSON-LD structured data for rich expandable search snippets.
Article Schema Generator — Generate Article, NewsArticle, and BlogPosting JSON-LD structured data.
Local Business Schema — Generate LocalBusiness JSON-LD schema with address, coordinates, opening hours, and phone.
Breadcrumb Schema Generator — Generate BreadcrumbList JSON-LD structured data for hierarchical search breadcrumbs.
Product Schema Generator — Generate Product and Offer JSON-LD schema with price, currency, rating, and availability.
JSON-LD Formatter & Validator — Format, beautify, and validate JSON-LD structured data blocks for syntax errors.
URL Parser & Analyzer — Deconstruct URLs into protocol, host, port, path, query parameters, and hash fragments.
URL Cleaner & Untracker — Strip tracking parameters, UTM codes, fbclid, and gclid from links for clean sharing.
URL Slug Generator — Convert article titles, product names, and phrases into clean SEO-friendly URL slugs.
Keyword Density Calculator — Analyze keyword frequency, percentage density, and 1-word, 2-word, 3-word phrase distribution.
Page Title Length Checker — Check Google SERP pixel width and character limits to prevent title truncation.
Meta Description Length Checker — Verify meta description character counts for optimal desktop and mobile search snippets.
UTM Campaign URL Builder — Build trackable campaign URLs with utm_source, utm_medium, utm_campaign, and utm_content.
UTM Cleaner — Strip UTM tracking tags and query garbage from copied URLs for clean sharing.
HTML Previewer & Sandboxed Runner — Live interactive browser previewer for HTML, CSS, and lightweight JS code.
Redirect Rule Generator — Generate 301 and 302 redirect rules for Apache .htaccess, NGINX, and Cloudflare.
Security Headers Generator — Generate Content-Security-Policy (CSP), HSTS, X-Frame-Options, and Referrer-Policy headers.
Meta Tag Analyzer — Paste HTML to audit meta tags, Open Graph properties, and SEO compliance.
Google SERP Simulator — Simulate live Google desktop and mobile search result snippet previews.

Calculators

Accurate mathematical, financial, and everyday conversion calculators. Solve percentage changes, calculate discount savings, estimate loan amortizations, calculate BMI metrics, and convert across 50+ international measurement units.

Percentage Calculator — Calculate percentage increase, decrease, percentage of a value, and find fractions.
Discount Calculator — Calculate final shopping sale prices, total dollars saved, and double discount stacks.
Tip & Bill Split Calculator — Calculate dining gratuity and split restaurant bills evenly among friends.
Sales Tax Calculator — Calculate sales tax, reverse tax from gross price, and find net totals.
Loan & Mortgage Calculator — Calculate monthly loan payments, total interest costs, and amortization schedules.
Investment & Savings Growth Calculator — Forecast investment growth over time with regular contributions and interest compounding.
Chronological Age Calculator — Calculate exact age in years, months, days, hours, and next birthday countdown.
Date & Days Calculator — Calculate days between two dates or add/subtract business days and weeks.
BMI Body Mass Index Calculator — Calculate Body Mass Index (BMI) using Metric or Imperial height and weight.
Universal Unit Converter — Convert length, weight, temperature, area, volume, speed, and digital data units.

Date & Time

Precision calendar, scheduling, and epoch time calculation tools. Determine exact chronological age, calculate working business days between two dates, convert Unix timestamps, and configure live countdown timers.

Age Calculator — Calculate exact age in years, months, days, hours, and minutes from birth date.
Date Difference Calculator — Calculate the exact number of days, weeks, months, and years between two dates.
Business Days Calculator — Count working days (Monday–Friday) between dates, excluding weekends and custom holidays.
Days Until Date Calculator — Find out exactly how many days are left until any upcoming date, holiday, or birthday.
Event Countdown Timer — Live ticking countdown clock down to the second for product launches and milestones.
Week Number Calculator — Find the ISO 8601 week number, start date, and end date for any calendar date.
Day of the Year Calculator — Find the ordinal day number (1–366) and remaining days in the calendar year.
Leap Year Checker — Check if any calendar year is a leap year with 366 days and astronomical explanation.
Time Difference Calculator — Calculate exact hours, minutes, and seconds between two time stamps.
Time Duration Adder & Subtractor — Add or subtract multiple hours, minutes, and seconds to calculate total time logs.
12 / 24 Hour Time Converter — Convert standard 12-hour AM/PM time into military 24-hour clock and vice versa.
Unix Timestamp Converter — Convert Unix epoch timestamps (seconds & milliseconds) to human-readable UTC and local time.
Timestamp to Date Converter — Convert numeric timestamps into formatted date strings across custom formats.
Date to Timestamp Converter — Convert human calendar dates and times into Unix epoch timestamps.
Monthly Calendar Generator — Generate and print clean, customizable monthly calendar grids for any year.
World Time Converter — Compare and convert times across global timezones (UTC, EST, PST, GMT, JST, CET).
Precision Stopwatch — High-precision stopwatch with millisecond accuracy and split lap recording.
Pomodoro Focus Timer — Customizable 25-minute Pomodoro study & productivity timer with short and long breaks.
Fiscal & Calendar Quarter Calculator — Find financial quarters (Q1, Q2, Q3, Q4) and quarter date ranges for any date.
Daylight & Solar Time Estimator — Estimate approximate sunrise, sunset, solar noon, and total daylight hours by latitude.

Finance & Money

Practical financial calculators and planning utilities for personal and business budgeting. Estimate monthly mortgage payments, calculate compound investment growth, compute business profit margins, and project net paycheck deductions accurately.

Mortgage Calculator — Calculate monthly mortgage payments (P&I, property taxes, home insurance, PMI) and amortization.
EMI Calculator — Calculate Equated Monthly Installments (EMI) for personal, car, or home loans.
Simple Interest Calculator — Calculate simple interest earned or paid over time using standard I = P × r × t.
Compound Interest Calculator — Calculate compound investment returns with recurring monthly contributions.
ROI (Return on Investment) Calculator — Calculate Return on Investment percentage and annualized ROI for business investments.
ROAS (Return on Ad Spend) Calculator — Calculate Return on Ad Spend for marketing campaigns and break-even ad target.
CAC (Customer Acquisition Cost) Calculator — Calculate the average marketing and sales cost spent to acquire one new customer.
LTV (Customer Lifetime Value) Calculator — Calculate Customer Lifetime Value and LTV-to-CAC health ratio for businesses.
Profit Margin Calculator — Calculate Gross Profit Margin, Net Margin, and Profit Markup from cost and revenue.
Markup Calculator — Calculate retail markup percentage, selling price, and profit based on wholesale cost.
Break-Even Point Calculator — Calculate the exact number of units and sales revenue needed to cover all fixed and variable costs.
VAT (Value Added Tax) Calculator — Add VAT (tax inclusive) or strip VAT (tax exclusive) across global tax rates.
Sales Commission Calculator — Calculate sales commission payouts based on total sales volume and tiered rates.
Salary to Hourly Wage Calculator — Convert annual salary into equivalent hourly, daily, weekly, and monthly rates.
Hourly to Salary Calculator — Convert hourly pay rate into equivalent annual, monthly, and weekly gross income.
Overtime Pay Calculator — Calculate overtime wages at 1.5x (time and a half) and 2.0x (double time) rates.
Paycheck & Take-Home Estimator — Estimate net take-home pay after federal, state tax, and retirement deductions.
Savings Goal Calculator — Calculate required monthly savings to reach a target financial goal in a specific timeframe.
Investment Portfolio Return Calculator — Project long-term portfolio growth across various asset allocation and return scenarios.
Auto Loan Calculator — Calculate monthly auto loan payments, vehicle trade-in credit, sales tax, and dealer fees.
Credit Card Payoff Calculator — Calculate how many months and total interest required to eliminate credit card balances.
Net Worth Calculator — Calculate personal net worth by summing total financial assets minus liabilities.

Color & Design

Color manipulation and UI styling utilities for designers and frontend developers. Convert seamlessly between HEX, RGB, HSL, and CMYK models, test WCAG accessibility contrast ratios, and generate CSS gradients and box-shadows.

HEX to RGB Converter — Convert 6-digit and 8-digit HEX color codes (#3B82F6) into RGB and RGBA values.
RGB to HEX Converter — Convert Red, Green, and Blue integers (0–255) to standard uppercase/lowercase HEX codes.
HEX to HSL Converter — Convert HEX colors to Hue, Saturation, and Lightness percentages.
HSL to HEX Converter — Convert Hue, Saturation, and Lightness coordinates into standard HEX color codes.
RGB to HSL Converter — Convert RGB values directly to HSL degrees and percentage coordinates.
HSL to RGB Converter — Convert HSL coordinates (Hue, Saturation, Lightness) into Red, Green, Blue values.
CMYK to RGB Converter — Convert print-ready CMYK (Cyan, Magenta, Yellow, Key/Black) percentages to screen RGB.
RGB to CMYK Converter — Convert digital screen RGB and HEX colors into print-ready CMYK ink percentages.
Interactive Color Picker & Inspector — Visual color picker with palette swatches, eyedropper, and multi-format conversions.
WCAG Contrast Checker — Check accessibility contrast ratio between text and background colors for WCAG 2.1 compliance.
Harmonious Color Palette Generator — Generate complementary, analogous, triadic, tetradic, and monochromatic color palettes.
CSS Gradient Generator — Visual linear and radial CSS gradient builder with multi-stop color angle controls.
CSS Box Shadow Generator — Visual multi-layer CSS box-shadow builder with blur, spread, offset, and inset controls.
CSS Border Radius Morphing Generator — Interactive 8-point CSS border-radius tool to create organic morphing blob shapes.
CSS Text Shadow Generator — Visual CSS text-shadow generator with blur, offset, 3D text effects, and glowing text.
CSS Button Generator — Visual CSS button designer with hover transitions, padding, gradients, and icons.
Glassmorphism CSS Generator — Visual frosted glass effect generator with backdrop-filter blur, transparency, and borders.
CSS Clamp Fluid Typography Generator — Generate fluid typography and responsive spacing formulas with CSS clamp(min, val, max).

Data & CSV

Browser-native structured data processing and transformation tools. Clean, sort, and deduplicate large CSV spreadsheets, convert tabular data into JSON arrays or TSV formats, and parse Data URIs with complete local privacy.

CSV Viewer & Table Inspector — Load, inspect, search, filter, and sort large CSV spreadsheet data in an interactive grid.
CSV Formatter & Beautifier — Clean, align, and standardize messy CSV files with consistent quoting and delimiters.
CSV to JSON Converter — Convert CSV spreadsheets into structured JSON arrays, keyed objects, or nested collections.
JSON to CSV Converter — Convert JSON arrays and nested objects into clean, exportable CSV spreadsheets.
CSV to TSV Converter — Convert comma-separated values (CSV) into tab-separated values (TSV) for Excel paste.
TSV to CSV Converter — Convert tab-separated values (TSV) copied from spreadsheets into standard CSV format.
CSV to YAML Converter — Convert CSV tabular data into structured YAML documents for configuration and data pipelines.
YAML to CSV Converter — Convert YAML lists and objects into tabular CSV format for spreadsheets.
CSV Deduplicator — Remove duplicate rows from CSV files based on entire rows or specific key columns.
CSV Column Extractor — Extract, reorder, or filter specific columns from a CSV spreadsheet file.
CSV Sorter — Sort CSV spreadsheet rows alphabetically (A-Z), numerically, or chronologically by column.
Data URI / Data URL Converter — Convert files and images into inline base64 data: URLs for HTML and CSS embedding.

Security & Privacy

Client-side cryptographic and privacy-hardening utilities. Compute SHA-256 and MD5 file checksums, generate cryptographically strong random passwords, evaluate password entropy, and strip sensitive tracking metadata locally.

Strong Password Generator — Generate cryptographically secure, randomized passwords with custom length and symbols.
Password Strength & Entropy Checker — Test password entropy, length, complexity, and estimate brute-force cracking time.
Cryptographic Hash Generator — Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text inputs.
File Hash & Checksum Calculator — Calculate SHA-256, SHA-512, and SHA-1 file checksums to verify download integrity.
HMAC (Keyed-Hash Message Auth) Generator — Generate HMAC-SHA256, HMAC-SHA512 signatures with secret keys for API authentication.
PII (Personally Identifiable Information) Redactor — Scan text and redact sensitive emails, credit cards, SSNs, and phone numbers for privacy.
Image EXIF & Metadata Stripper — Remove GPS coordinates, camera model, and timestamp metadata from photos before sharing.
RSA Key Pair Generator — Generate cryptographically secure RSA 2048-bit and 4096-bit Public & Private key pairs.

Generators

Fast asset and identifier generation tools for digital projects. Create customized QR codes with logos, produce standard retail barcodes, generate UUID v4 identifiers, and format print-ready PDF invoices directly in your browser.

QR Code Generator — Create custom high-resolution QR codes for URLs, WiFi credentials, vCards, and text.
Barcode Generator — Generate CODE128, EAN-13, UPC-A, and CODE39 barcodes for retail and logistics.
Email Signature Generator — Design beautiful, modern, and mobile-responsive HTML email signatures.
Open Graph Image Generator — Generate 1200x630 social share preview images for Twitter, LinkedIn, and Facebook.
Robots.txt Builder & Generator — Create search-engine compliant robots.txt rules for Googlebot, Bingbot, and AI crawlers.
XML Sitemap Generator — Generate XML sitemaps to help search engines crawl and index your web pages.
Strong Password Generator — Generate cryptographically secure, random passwords with custom rules.
UUID / GUID Generator — Batch generate RFC-4122 version-4 universally unique identifiers.
PDF Invoice Generator — Create clean, professional PDF invoices with automatic tax and total calculation.

Social Media

Publishing and content preparation helpers for modern social networks. Format clean line breaks for Instagram and Threads, verify character limits across X and LinkedIn, organize hashtags, and reference platform image dimensions.

Instagram Line Break & Caption Formatter — Format Instagram captions with clean line breaks, spaced paragraphs, and no awkward dots.
All-in-One Social Media Character Counter — Simultaneously test character and word limits for Twitter/X, Instagram, LinkedIn, TikTok, and YouTube.
Hashtag Organizer & Cleaner — Format, deduplicate, clean, and organize sets of social media hashtags.
YouTube Title & Tag Checker — Check YouTube title pixel length, 100-character cap, and 70-character mobile truncation point.
Social Media Image Dimensions & Resizer Guide — Reference standard aspect ratios and export dimensions for Instagram, YouTube, Twitter, and LinkedIn.
Social Media Mockup Post Previewer — Create pixel-perfect visual preview mockups of tweets, posts, and announcements.

Education & Math

Academic calculation and reference tools for students, educators, and researchers. Calculate cumulative GPA, estimate required final exam scores, solve quadratic equations and triangle geometry, and analyze statistical datasets.

College & High School GPA Calculator — Calculate weighted and unweighted Grade Point Average (GPA) on a 4.0 or 5.0 scale.
Final Grade Calculator — Calculate the exact exam score you need on your final exam to earn your target course grade.
Percentage to GPA Converter — Convert 0–100% academic grades into standard 4.0 scale GPA and letter grades.
Fraction Calculator & Simplifier — Add, subtract, multiply, divide, and simplify fractions and mixed numbers.
Quadratic Equation Solver — Solve quadratic formulas ($ax^2 + bx + c = 0$) with discriminant, real roots, and complex numbers.
Pythagorean Theorem & Right Triangle Solver — Calculate hypotenuse, side lengths, angles, and area of right triangles ($a^2 + b^2 = c^2$).
Mean, Median, Mode & Statistics Calculator — Calculate Mean, Median, Mode, Standard Deviation, Variance, Range, and Quartiles for datasets.

File Utilities

Convenient file management utilities designed for daily desktop workflows. Convert between binary and decimal file size units, identify MIME types and file signatures, sanitize filenames for web publishing, and compute file hashes on your device.

File Size Unit Converter — Convert file sizes between Bytes, KB, MB, GB, TB, PB (Decimal 1000 and Binary 1024 KiB/MiB).
MIME Type Lookup & Header Inspector — Find official IANA Content-Type MIME types and file extensions for 400+ file formats.
Filename Sanitizer & Cleaner — Sanitize filenames for cross-platform compatibility across Windows, Mac, Linux, and URLs.
Batch File Renamer Script Generator — Generate Bash, PowerShell, and CMD batch scripts to rename hundreds of files at once.