Base64 Encoder / Decoder — Free Online, No Signup

URL-safe Data URI

Text to encode

Drop a file here or to encode

Base64 output

Free Base64 Encoder & Decoder — text to Base64 and back, in your browser

Convert text to Base64 or decode Base64 back to text instantly. It handles full Unicode (accents, non-Latin scripts and emoji) and offers a URL-safe variant. Everything runs locally in your browser — no signup, nothing uploaded.

Private by design

Base64 is an encoding, not encryption — it does not protect data, it just represents bytes as text. This tool never sends your input anywhere: encoding and decoding happen entirely on this page, so you can safely convert tokens, config snippets or data URIs.

What you can do

Encode — turn any text into Base64.

Decode — turn Base64 back into readable text.

Unicode-safe — accents, emoji and non-Latin scripts work.

URL-safe variant — -/_ instead of +//, no padding.

Files & images — drop a file to get its Base64 or a data: URI, with a live preview.

History — your recent inputs are kept in your browser; click to restore.

No signup, free — client-side, light & dark themes, EN/FR/ES.

Frequently asked questions

Is my data sent to a server?

No. Encoding and decoding happen entirely in your browser with JavaScript. Nothing you type is uploaded or logged anywhere.

Does it support Unicode and emoji?

Yes. Text is handled as UTF-8, so accented characters, non-Latin scripts and emoji encode and decode correctly.

What is URL-safe Base64?

URL-safe Base64 replaces the + and / characters with - and _ and drops the = padding, so the result can be used safely in URLs and file names. Toggle it on and the tool encodes and decodes that variant.

Can I encode an image or file to Base64?

Yes. Drop a file onto the encode box (or choose one) and you get its Base64 — tick “Data URI” to wrap it as a data:…;base64,… string you can paste straight into CSS or HTML. Decoding a data URI or image Base64 shows a preview and a Download button. Files are read locally and never uploaded.

Is it free and without signup?

Yes, completely free with no signup. It is a client-side Base64 tool for developers and students.