Entrovix AI

Base64 Encoder & Decoder

Convert text to Base64 and back, including the URL-safe variant. Handles emoji and non-Latin scripts correctly, which naive implementations get wrong.

Runs in your browser — nothing is uploaded

Input
Output

Your result appears here. Everything runs in your browser.

Why use it

Built to be genuinely useful

Nothing is uploaded

Everything runs in your browser, so your input never reaches a server.

Free, no sign-up

No account, no usage cap, and no feature held back behind a paywall.

Unicode-safe

Encodes via UTF-8, so accented characters, Devanagari and emoji survive the round trip.

URL-safe output

Produces the -_ variant with padding stripped, for tokens and query strings.

How it works

Three steps

  1. 1

    Paste your text or an existing Base64 string.

  2. 2

    Pick Encode, Encode (URL-safe) or Decode.

  3. 3

    Copy the result — it updates as you type.

What Base64 is for

Base64 represents binary data using 64 printable ASCII characters. It exists because plenty of systems — email headers, URLs, JSON fields, HTML attributes — can only carry text safely, and raw bytes passing through them get corrupted.

It is an encoding, not encryption. Anyone can decode Base64 instantly, so it protects nothing. If you are using it to hide a value, that value is not hidden.

The cost is size: Base64 output is roughly 33% larger than the input, because every three bytes become four characters. That matters when embedding images in CSS or HTML, where the saving from avoiding a request has to outweigh the extra bytes.

Standard vs URL-safe

Standard Base64 uses + and / as its last two characters and = for padding. All three have meaning inside a URL, so a token pasted into a query string can break.

The URL-safe variant substitutes - for + and _ for /, and usually drops the padding. JWTs use this variant, which is why a JWT part often fails to decode in a standard Base64 tool. This one accepts either and restores the padding automatically.

FAQ

Questions people ask

Related tools

More developer tools

Available tools are linked; the rest are in development.

Base64 DecoderURL EncoderURL DecoderJWT DecoderHash GeneratorImage CompressorImage ResizerImage OptimizerJPG → PNGPNG → JPGJPG → WEBPWEBP → JPG
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