Encode text or files to Base64 and decode Base64 strings back to text or downloadable files. Live encoding as you type. Supports text and binary file input.
Open Base64 Encoder/Decoder → free, no sign-inBase64 encoding shows up everywhere in web development: email attachments, data URIs for images embedded in CSS, API authentication tokens, JWT headers, binary data passed through JSON. The Base64 Encoder/Decoder handles both directions instantly — paste text or upload a file to encode it, paste a Base64 string to decode it back to text or a downloadable file. The encoding is live as you type.
Developers inspecting or constructing authentication headers, encoding images as data URIs, debugging API responses that contain Base64 content, or working with any protocol that uses Base64 as a transport encoding.
No tutorials. No learning curve. Open it and get started.
No server uploads. Handles both text and binary files — you can encode an image and get the Base64 data URI ready to paste into your CSS.
Completely free. No trial period. No premium tier for basic functionality. No account required. Use it as often as you need.
One job, done well. Base64 Encoder/Decoder was built to solve a specific problem cleanly. No feature bloat, no ads, no distractions.
What is Base64 used for?
Base64 encodes binary data as ASCII text — it's used for email attachments, data URIs, JWT tokens, and HTTP authentication headers.
Can I encode images?
Yes — upload an image file and get a Base64 data URI for embedding in CSS or HTML.
Does Base64 encryption provide security?
No — Base64 is encoding, not encryption. Anyone can decode it. Use it only for data transport, not confidentiality.
Is my data sent to a server?
No — all encoding and decoding runs locally in your browser.
What's the size overhead?
Base64-encoded data is approximately 33% larger than the original binary.
Free. Instant. No sign-in. Open it and get the job done.
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