Base64 Encoder
Free Base64 encoder — no sign-up. Encode text and files to Base64 format instantly. 100% client-side and private.
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Base64 Encoder is a free online utility for encoding and decoding text or files to and from Base64 format, right in your browser. As a 100% client-side developer tool, nothing you enter ever reaches a server — your data stays private and secure on your device. Base64 encoding is widely used in web development for embedding binary data into data URIs, transmitting data in APIs, storing images or fonts in CSS, and handling raw binary content over text-based protocols. Our tool supports converting plain text to Base64 strings, decoding Base64 strings back to readable text, encoding image files (PNG, JPG, GIF) into Base64 data URIs, and decoding Base64 strings back to viewable images — all with a single click. Simply paste your text or Base64 string, select encode or decode mode, and the result appears instantly. Developers use it for API payload testing, creating inline images, and debugging encoded data. No downloads, no sign-up, no data collection — just a fast, private Base64 codec that works on any device including phones, tablets, and desktops.
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Base64: 64 ASCII characters for binary-to-text encodingHow do I encode to Base64? +
Enter your text and click encode. The Base64 output will appear instantly.
What is Base64 encoding? +
With Base64 Encoder, Base64 is a method of converting binary data into a text string using 64 ASCII characters. It is commonly used for embedding images in HTML, sending attachments via email, and storing binary data in text formats.
Can I encode and decode files, not just text? +
Yes. Upload any file — images, documents, or binary data — and the tool encodes it to Base64. You can also paste Base64 to decode it back to the original file.
Is there a character or file size limit? +
There is no artificial limit. Large files produce longer Base64 strings, but the tool handles them in the browser without issues.
What is the difference between Base64 encoding and encryption? +
Base64 encoding is NOT encryption. It is a reversible representation format. Anyone can decode Base64 — it provides no security.