Base64 text encoder and decoder

  1. Input
  2. Options
  3. Result
Input

Operation

Base64 alphabet

Processing stays on your device. Inputs are not saved automatically.

Processing runs in your browser. Encoding accepts up to 512 KiB of UTF-8 data; decoding accepts up to 524288 encoded characters. Base64 changes the representation of data and provides no encryption. Standard Base64 needs trailing = characters when required; Base64URL may omit them. Bytes that are not valid UTF-8 remain binary data.

Convert Base64 online

Use the encoder for text snippets, tokens and small payloads that need Base64 representation.

The decoder supports UTF-8 text and helps inspect encoded values without installing extra software.

Quick start

Base64 text encoder and decoder

  1. Choose your input or try an example.
  2. Review the settings and run the tool.
  3. Check the result and save a copy.
✓ The tool runs directly in the browser and is ready for quick checks without installing software.
✓ Input can be cleared and recalculated immediately, which is useful for repeated small tasks.
✓ Use fullscreen mode when you need more space for long text, structured data or large result blocks.
✓ Copy buttons are available on generated output so results can be reused in code, documents or support chats.
✓ Most operations are deterministic: the same input and options produce the same output.
✓ For sensitive content, prefer local browser tools and review the result before sharing it further.

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