Input
Base64 Encode / Decode
Convert readable text into Base64 for data URLs, tokens, and developer workflows, or decode Base64 back into plain text.
Browser-based No signup required Private input
How to use Base64 encode decode
- Paste text or a Base64 string.
- Choose Encode or Decode.
- Copy or download the result.
FAQ
Is Base64 encryption?
No. Base64 is encoding, not security. Anyone can decode it.
Does it support Korean or accented text?
Yes. The tool uses UTF-8 encoding for readable Unicode text.
Is my text uploaded?
No. Everything runs locally in your browser.
How to encode or decode Base64
- 1Paste your text or Base64Type or paste into the input box. Plain text on one side, Base64 on the other.
- 2Choose encode or decodeSwitch direction to turn text into Base64, or Base64 back into the original text.
- 3Copy the resultThe output updates instantly — copy it with one click to use anywhere.
Why use this Base64 tool
- Instant, two-way encode and decode as you type
- Runs in your browser — nothing is sent to a server
- Safe for tokens, keys, and sensitive strings
- Free, with no sign-up and nothing to install
Developer Tools
Encode and decode Base64 in your browser
Base64 is a way to represent binary or text data using only safe, printable characters, which is why it shows up in data URLs, email attachments, API tokens, and config files. This tool encodes any text to Base64 and decodes Base64 back to readable text instantly as you type. It runs entirely in your browser, so tokens, keys, and other sensitive strings are never sent anywhere.
Best results
- Use it for data URLs, tokens, and config snippets
- Decode to check what an encoded string actually contains
- Keep an original copy before replacing encoded values
Common fixes
- Decode fails? Check for stray spaces or line breaks
- Getting odd characters? Make sure the input is valid Base64
- Need URL-safe output? Watch for + and / characters in the result
Private by design
Encoding and decoding run entirely in your browser using client-side JavaScript. Your text is never uploaded, stored, or shared, so sensitive tokens and keys stay on your device.
Frequently asked questions
Is the Base64 tool free?
Yes. Encoding and decoding Base64 is completely free with no sign-up required.
Is it safe for tokens and secrets?
Yes. Everything runs in your browser and nothing is sent to a server, so sensitive strings never leave your device.
Does it work both ways?
Yes. You can encode plain text into Base64 and decode Base64 back into readable text.
Is Base64 a form of encryption?
No. Base64 is encoding, not encryption. It makes data safe to transport but anyone can decode it, so do not use it to protect secrets.
Does it handle Unicode text?
Yes. It handles standard text, including accented and non-Latin characters, using UTF-8.