How to encode files safely
Files are encoded in this browser. The result commonly uses a data URL with a MIME type and Base64 data, which is useful for HTML, CSS, JSON, and test fixtures. Larger files require substantially more memory and produce much longer output.
Good use cases
- Create data URLs for small icons, samples, and test attachments.
- Inspect locally generated Base64 without uploading a file to another service.
- Prepare embedded development assets, not large production assets.
Security and privacy
Base64 is not encryption and does not protect passwords, tokens, or personal data. Do not put sensitive content in links, screenshots, or logs. Text and files are processed only in this browser session; the tool does not retain conversion results after the page is closed or refreshed.
Common questions
Turn on URL-safe encoding when the result must be used in a URL. It replaces the standard Base64 special characters with - and _. If text becomes garbled between systems, make sure both the sender and receiver use UTF-8.