Base64 Encode / Decode
This free Base64 tool encodes plain text into Base64 and decodes Base64 strings back to readable text. Type or paste your input, pick a direction, and copy the result — it all happens on your device, so nothing leaves your browser.
How to use Base64 Encode / Decode
- 1 Type or paste your text into the Input box.
- 2 Click 'Encode →' to turn text into Base64, or '← Decode' to turn Base64 back into text.
- 3 The result updates live as you edit the input.
- 4 Copy the result with one click, or hit Clear to start over.
Frequently asked questions
Is my text uploaded to a server when I encode or decode?
No. Encoding and decoding both run locally in your browser with JavaScript. Your input never leaves your device, so it's safe for private strings, tokens, or credentials.
Why do I get an 'Invalid Base64 input' error?
That message appears when the text you're decoding isn't valid Base64 — usually because it has stray characters, is truncated, or is actually plain text. Switch to Encode if you meant to convert text into Base64.
Does it handle emoji and non-English characters?
Yes. The tool encodes full Unicode text, so emoji, accents, and non-Latin scripts round-trip correctly through encode and decode.
Does this tool work offline?
Yes. PDFPowerHub is a PWA, so once the page has loaded it keeps encoding and decoding even with no internet connection.