Local data workspace
Base64 Encoder & Decoder
Encode or decode UTF-8 text and files with standard or URL-safe Base64, optional padding, previews, copy, and downloads entirely in your browser.
No upload · No account · Runs in this browser · Updated 2026-08-03
Base64 workspace
UTF-8 text mode
Text
Unicode-safe conversion
Encode UTF-8 text and decode it back without corrupting non-ASCII characters. URL-safe input is detected during decoding.
Files
Raw Base64 or data URLs
Encode a local file, optionally include its MIME data URL prefix, or decode Base64 bytes and download the resulting file.
Important
Encoding is not encryption
Anyone can reverse Base64. Do not use it to protect passwords, API keys, personal data, or any other secret.
FAQ
Is Base64 secure?
No. Base64 is encoding, not encryption. Anyone with the encoded text can decode it, so do not use it to protect passwords, tokens, or private notes.
Can it handle non-English text?
Yes. The tool uses Unicode-safe text encoding and decoding, so normal multilingual text can round-trip instead of breaking into unreadable bytes.
What happens if the Base64 input is invalid?
The decoder shows an error and leaves the output empty instead of guessing. This makes broken padding, copied spaces, and wrong input easier to catch.
When should I use URL encoding instead?
Use URL encoding for query values and link parts. Use Base64 when bytes or text need to be represented as a text-safe alphabet.