Base64 Encoder / Decoder

Encode and decode text strings, binary data, and files into Base64 format.

Processing Architecture: Client-Side (Processed locally in your web browser with zero server uploads)

How to Use Base64 Encoder / Decoder

  1. Step 1: Select Mode

    Choose 'Encode' to turn text into Base64 or 'Decode' to read Base64.

  2. Step 2: Enter Input

    Type/paste text or drop a file to process.

  3. Step 3: Copy Result

    Copy the resulting Base64 or decoded text with one click.

Key Features & Capabilities

  • Instant real-time bi-directional encoding & decoding
  • UTF-8 international characters and emoji support
  • File-to-Base64 conversion support

Specifications & Limits

  • Batch Processing: Single Item
  • Free Tier Limit: Unlimited text strings and files up to 25MB

Frequently Asked Questions

Is Base64 encryption?

No. Base64 is an encoding method. It is reversible and does not require a secret key.

Why does Base64 make data larger?

Three bytes of input become four Base64 characters, so the encoded representation is about 33% larger before additional formatting or transport overhead.

What is the difference between Base64 and Base64URL?

They use closely related encoding rules, but the URL-safe form substitutes `-` and `_` for `+` and `/` so the result is easier to place inside URLs and similar contexts.

Can I use Base64 for passwords or secrets?

Encoding a password or secret as Base64 does not protect it. Sensitive values need proper security controls, and passwords should normally be handled with password-specific hashing rather than reversible encoding.

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