Base64 encode online
Base64 represents binary data as ASCII text so it can travel in JSON, email, or data URIs. Developers search “base64 encode online” when wiring APIs or embedding small assets—not the same need as hashing or encryption.
How Base64 Encoder Works
Paste or enter your input in the field above. Most tools update in real time. Click the Copy button to copy the output. All processing happens in your browser—your data never leaves your device unless the tool explicitly uses a server feature (such as URL shortening or bcrypt hashing).
This tool is part of the Encoders & Decoders category. Check similar tools below. All everytools are free, no signup required. Works on desktop and mobile.
Related topics
Base64 encoder vs Base64 decoder
This page encodes raw input to Base64. To turn Base64 back into bytes or text, use our Base64 decoder tool—link it in reviews and runbooks so teams do not confuse direction in incidents.
Common Use Cases
- Encode small images or icons for inline data URIs in CSS or HTML
- Prepare binary snippets for JSON payloads in REST APIs
- Debug what a third-party SDK expects before sending over the wire
- Pair with the decoder when validating round-trip configs
Guides & platform tips
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Frequently Asked Questions
- What is Base64 used for?
- Common uses include embedding files in JSON, attaching binary payloads in text-only channels, and building data: URIs for images or fonts. It is encoding, not encryption—anyone can decode Base64.
- Base64 vs Base64URL?
- Standard Base64 can include +, /, and = padding. URL-safe variants swap characters for hyphen and underscore. If your API expects URL-safe Base64, normalize before decoding.
- Does Base64 make data secret?
- No. Do not treat Base64 as security. For secrets use proper encryption and key management, or hashed passwords with algorithms designed for that purpose.