Free Base64 Encoder & Decoder Online
Encode text to Base64, decode Base64 back to text, or convert an image file into a Base64 data URL for embedding in HTML/CSS. Unicode-safe, instant, and private — everything runs in your browser.
How to Use the Base64 Encoder & Decoder Online in 3 Steps
- Choose Encode or Decode mode, then type text or select a file.
- Click the convert button — your Base64 output appears instantly.
- Copy the result or download it as a file.
Frequently Asked Questions
Is it free?
Yes, completely free with no limits and no cost. Encode and decode as much text and as many files as you want, as often as you want. No credits, no file-size paywalls, no signup — every feature is free for everyone, forever.
Do I need to sign up?
No signup needed — ever. Just open the page and start converting immediately: no account to create, no email address required, no trial period. The encoder works instantly in your browser the moment the page loads, with zero setup required.
Is my data/code private?
Yes, 100% private. Encoding and decoding happen entirely in your browser using JavaScript — your text and files are never uploaded to any server, never stored anywhere, and never seen by anyone. Safe for API keys, auth tokens and confidential documents.
What is Base64 used for?
Base64 is used to embed binary data in text-only formats: images in HTML/CSS and JSON APIs, email attachments (MIME), authentication tokens like JWTs, and data URLs. It converts any bytes into safe ASCII characters (A–Z, a–z, 0–9, +, /, =) that survive transport without corruption.
Can I encode images or files?
Yes. Select any file — images, PDFs, documents — and the tool reads it locally and outputs its Base64 string, perfect for data URLs or embedding in code. Large files are handled in your browser without uploading, though very big files may take a moment to process.
Is Base64 encryption?
No — Base64 is encoding, not encryption. Anyone can decode a Base64 string instantly, so it provides zero security. Never use it to 'protect' passwords or secrets; it's meant for safe data transport, not confidentiality. Use real encryption like AES for sensitive data.
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