Base64 & URL Encoder
Encode or decode Base64 and URL strings.
🔒 Processed on your device — nothing is uploaded.
About the Base64 & URL Encoder
Base64 turns binary data or text into plain characters that are safe to put in emails, URLs, JSON and HTML. Encode or decode Base64, URL-safe Base64URL and percent-encoded URLs, or turn any file into a data URI — all with full UTF-8 support.
When to use it
- Embedding small images in CSS or HTML as data URIs
- Decoding Base64 strings found in emails, APIs and tokens
- Encoding query-string values for links
- Debugging authentication headers
Tips for the best results
- Base64 is encoding, not encryption — anyone can decode it
- Base64URL replaces + and / with - and _ so it is safe inside URLs
- Data URIs are about 33% larger than the original file
How to use the Base64 & URL Encoder
- Paste your input into the Base64 & URL Encoder.
- The output is generated instantly in your browser.
- Copy or download the result.
Base64 & URL Encoder FAQ
Is the Base64 & URL Encoder free?
Yes. The Base64 & URL Encoder is completely free with no sign-up, no daily limit and no watermark.
Is it safe to use the Base64 & URL Encoder with private files?
Yes. The Base64 & URL Encoder runs entirely inside your web browser, so your files and text are never uploaded to any server.
Does the Base64 & URL Encoder work on mobile?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.
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