Base64 to JSON

Decode Base64 strings and instantly format the output as pretty-printed JSON.

Last Updated: October 2026
100% Client-Side — Your data never leaves your device

Why this tool is safe

Your data never leaves your device — everything runs in your browser.

No server uploads. Other tools send your files to their servers. Ours don't.
Zero tracking of content. We never see, store, or log anything you convert.
Works offline. Once loaded, the tool works without an internet connection.
No account required. Instantly use all tools completely free without signing up.

Frequently Asked Questions

Search below or browse through our most commonly asked questions.

JSON is often Base64 encoded when embedded in URLs, query parameters, or JWT tokens to ensure the payload survives systems that might mangle raw JSON characters.

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