About Base64 Studio

Base64 Studio is a set of free Base64 tools for everyone who works with data: developers, testers, support teams and students.

Private by design

Every converter on this site runs inside your browser. When you encode a contract, decode a token or turn a photo into a data URI, the data never travels to our server - there is no upload at all. You can check it yourself: open your browser's developer tools, watch the network tab and convert something. You can even go offline after the page has loaded.

How the site stays free

The tools are paid for by a few clearly marked ads on the left and at the bottom of each page. They are served from this site, without third-party scripts or tracking cookies, and every advertiser is checked by a person before an ad goes live. Interested? See advertising.

What you can do here

• Encode text in UTF-8, UTF-16, Latin-1 or Thai (Windows-874), URL-safe and with MIME line breaks.
• Decode Base64 forgivingly, with exact error positions and automatic file detection.
• Turn images into data URIs, resized and compressed first if you like.
• Turn Base64 back into files - PDF, Office, ZIP, audio, video - with a preview.
• Read JWTs, convert Base64URL, convert hex and validate strings.
• Automate it with the free JSON API.

Contact

Questions, ideas or a bug? Write to support@example.com.