Text to Base64 Encoder - Free Online Tool

Convert plain text, JSON, or credentials into a Base64 string in one click. Unicode and emoji are handled correctly. Encoding runs locally so tokens and secrets are never uploaded.

B64

Base64 Encoder/Decoder

LOCAL · Browser-Only

Encode text to Base64 or decode Base64 strings instantly

URL-safe

Line wrap:

Text to encode

Result

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Quick Start

1Switch to Encode mode
2Paste or type the text you want to encode
3Click Encode to get the Base64 output
4Copy the result or use Swap to chain another conversion

What This Tool Does

Text is converted to UTF-8 bytes first and then to Base64, which is the part naive encoders get wrong. Accented characters, non-Latin scripts and emoji survive the round trip instead of throwing an error or coming back mangled.

Three options shape the output. URL-safe swaps the two characters that cause trouble in a query string and drops the padding. Line wrapping breaks the output at 76 characters for mail-style use or 64 for key-file style, or leaves it as one long string.

Files can be encoded too, up to twenty at a time, and a data URI prefix can be added so the result drops straight into a stylesheet or an image tag. Decoding is paste-only, and it accepts standard or URL-safe input with or without padding.

Limits Worth Knowing

Encoding is not encryption. Base64 is trivially reversible and hides nothing from anyone who wants to read it.
Base64 output is about a third larger than the input, and the size increase is shown next to the result.
Decoding something that is not text reports that it decoded to binary and offers to save it as a file instead.
The file encoder handles files up to a hundred megabytes each and reads them entirely in memory.
Everything runs in your browser, so a token or a credential pasted here is not sent anywhere.

Common Questions

Does it handle emoji and accented characters?

Yes. The text is converted to UTF-8 bytes before encoding, so anything you can type comes back identically after a decode.

When should I use URL-safe output?

Whenever the value goes into a query string, a path segment or a filename. It swaps the two characters that would otherwise need escaping and removes the trailing padding.

Can I encode an image?

Yes. Switch the input to File, pick the image, and tick the data URI option to get a string you can paste directly into CSS or an image tag.

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Looking for FAQs and advanced options? Visit the full Base64 Encoder/Decoder page →