API debugging
Decode Base64 values from headers, payloads, webhooks, and logs while checking what an integration is sending.
< Developer tools
64Local Base64 tool
Base64 Encoder Decoder Online
Encode text to Base64 or decode Base64 to readable text directly in your browser for API debugging, test fixtures, and development workflows.
Encode
Base64 utility
Decode
Base64 utility
Local
Base64 utility
Base64 encode or decode
Choose a mode, paste text or Base64, and transform it locally without sending the input to a backend.
Base64 result
Encoded successfully
Qm90UU5BIGRldmVsb3BlciB0b29scw==
Why use this Base64 encoder decoder?
Test fixtures
Encode plain strings into Base64 for unit tests, mock data, sample payloads, or documentation snippets.
Browser based
The transform runs in the browser, which keeps the workflow fast and avoids a network round trip.
Base64 workflow tips
Base64 is not encryption
Base64 only changes representation. Anyone can decode it, so do not use it to protect passwords, secrets, or private tokens.
Remove accidental whitespace
When decoding, this tool ignores whitespace so copied multi-line strings are easier to inspect.
Check character encoding
This page handles UTF-8 text, which is usually what you want for API payloads and modern web applications.
Privacy note
The Base64 transform runs locally in your browser. Avoid pasting production secrets into any web tool unless you control the environment.
Base64 encoder decoder FAQ
What is Base64 used for?
Base64 is commonly used to represent binary or text data in an ASCII-safe format for APIs, headers, files, and transport protocols.
Is Base64 secure?
No. Base64 is encoding, not encryption. It does not hide sensitive data from anyone who can read the encoded value.
Can this decode JWTs?
Use the JWT Decoder for tokens. JWTs use Base64URL parts plus a signature, so a token-specific view is easier to inspect.
Does this upload my text?
No backend request is needed for the Base64 transform. The calculation runs in the browser.