Convert text to Base64 and back in real time. Switch between the standard and URL-safe alphabets and handle full Unicode correctly. Handy for data URLs, HTTP headers, API payloads and debugging encoded strings.

Live bidirectional conversion

URL-safe alphabet

Full Unicode (UTF-8)

One-click copy

Use the tool now Step by Step

Trusted & free

It is completely free, private and requires no signup.

IDs are not secrets

A UUID identifies a record — never use it as an authentication token.

Use crypto randomness

Math.random() is predictable. Use the CSPRNG for tokens, IDs and secrets.

Never trust a JWT blindly

Decoding is not verifying. Always validate the signature and claims on the server.

Keep secrets out of code

Generate keys here, then store them in environment variables or a vault.

How it works

Select Encode to turn text into Base64, or Decode to turn Base64 back into readable text.

URL-safe replaces + and / with - and _ so the result can be embedded in URLs and filenames.

The output updates as you type — copy it with one click.

Examples & Data

Plain text	Base64
Hello	SGVsbG8=
password	cGFzc3dvcmQ=
Bright Coding	QnJpZ2h0IENvZGluZw==
1 + 1 = 2	MSArIDEgPSAy

Spaces, symbols and Unicode are all preserved on decode.

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Decode browser, OS and device from any UA

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File extension to MIME type reference

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Percent-encode URLs and parse query strings

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Check text contrast against WCAG AA & AAA

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UUID v4, v7, ULID and NanoID in bulk

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Decode, inspect and sign JSON Web Tokens

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Convert colors and copy HEX, RGB or HSL

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Convert CSV to JSON and JSON back to CSV

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camelCase, snake_case, kebab-case, Title & slug

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Ready to try it?

It is completely free, private and requires no signup.

Use the tool now

100% Free No signup Private & secure

Help Center

Frequently Asked Questions

No. Base64 is only an encoding — anyone can decode it. Never use it to hide passwords or secrets.

It encodes 3 bytes into 4 characters, so the output is about 33% larger than the input.

A variant that swaps + and / for - and _ so the string is safe inside URLs, query strings and JWT segments.

Yes. Text is UTF-8 encoded before conversion, so accents, Arabic, Chinese and emoji all round-trip correctly.

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