Turning an image into Base64 for a CSS file, a JSON payload, or an email template shouldn’t quietly change the file. Our new Image to Base64 Converter reads your file’s exact original bytes and represents them as text — nothing decoded, recompressed, or redrawn.
- Two clearly separated modes — Image → Base64 and Base64 → Image, switched with a single click.
- Byte-for-byte encoding — built on
FileReader.readAsDataURL(), which preserves the file exactly, unlike routing it through a canvas (the technique our Image Format Converter uses on purpose, for the opposite reason). - Both outputs, separately — the full data URI in one copyable box,
and just the raw Base64 payload in another, since some use cases only
want the string after the
data:image/…;base64,prefix. - A real size comparison — original file size next to the resulting Base64 length, with the actual percentage increase computed for your file rather than a rounded rule of thumb (it’s close to 33%, because every 3 bytes becomes 4 characters).
- Friendly errors, not broken icons — pasting invalid or incomplete
Base64 into the decode side shows a clear message instead of a dead
image icon, and raw Base64 without a
data:prefix gets one added automatically. - Private by default — encoding and decoding both happen entirely in your browser; nothing is ever uploaded to a server.
Paste in a data URI you found in a stylesheet, or convert a small icon or photo to Base64 for embedding — either direction, nothing leaves your device.