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Base64 Encode/Decode

Base64 encode or decode text and files in-browser—handy for APIs, data URIs, and debugging without installing a CLI.

Runs in browserNo signupCopy or download result
Open editor

Editor

Adjust the asset, then export it.

Upload, paste, or preview the source, tune the options, and leave with a copy-ready or downloadable result.

Source

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Preview

Adjust settings and inspect the visible output.

Export

Download, copy, or continue into a Studio.

Developer settings

Choose encode or decode in settings.

Formatted code, generated types, decoded values, or snippets appear here.

Privacy: This tool runs entirely in your browser. No data is sent to our servers. We don't store, share, or have access to any of the information you process here.

Editor workspace and output options

Export package

Use the result area as the copy-ready handoff for the next step in your work.

Input
The text, data, code, or settings you provide.
Result
Cleaned, generated, validated, converted, or formatted output.
Carry forward
Copy, download, or continue into the related guide.

Sample inputs and editing tips

How to edit and export cleanly

The Base64 Encode/Decode tool is useful for debugging API payloads, data URIs, basic credentials, and other text or file content that has been encoded for transport.

It now handles Unicode text correctly, so non-English text and symbols do not break during encode and decode operations.

Common use cases

  • Decode a small Base64 value from an API response or JWT-like payload.
  • Encode sample text for a data URI, fixture, or documentation example.
  • Check whether a copied Base64 string is valid before using it elsewhere.

How to use it well

  1. Paste the source data or upload a supported file when the tool allows it.
  2. Select formatting, conversion, or generation options.
  3. Run the tool and check errors or warnings before using the result.
  4. Copy the output into your editor, terminal, documentation, or test file.

Practical tips

  • Base64 is encoding, not encryption; never treat it as a security boundary.
  • Remove surrounding quotes, spaces, or line breaks if a decode operation fails.
  • For very large files, prefer a local command-line tool to avoid browser memory limits.

Limitations to know

  • Base64 output is larger than the original data, usually by about one third.
  • Invalid padding or truncated input cannot be recovered automatically.

FAQ

Q: Is it secure?

A: All processing happens locally in your browser.

Q: Can I encode files?

A: Yes, upload any file to get its Base64 representation.

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Privacy: This tool runs entirely in your browser. No data is sent to our servers. We don't store, share, or have access to any of the information you process here.