Strip
Remove Data URI Prefix
Paste a data URI and get just the raw Base64 back — the data: prefix and MIME header removed automatically.
Data URI input
—Raw Base64
0 chars
About this tool
About Remove Data URI Prefix
Remove Data URI Prefix strips the data: scheme and MIME header from a data URI, returning just the raw Base64. It is for developers who need the payload without the wrapper.
Sometimes a system wants only the Base64, not the full data URI. Removing the prefix locally is instant and keeps the data private.
How to use
Step by step
- Paste a complete data URI.
- The data: prefix and MIME header are removed automatically.
- Review the raw Base64 result.
- Copy it for use where only the payload is needed.
Key features
What it offers
- Automatic prefix removal
- Returns raw Base64
- Instant processing
- Runs locally — Remove Data URI Prefix
Common use cases
Where it helps
- Extracting the payload from a data URI for storage
- Feeding raw Base64 into a system that adds its own prefix
- Cleaning a data URI down to its data for comparison
- Preparing a payload for decoding elsewhere
Best practices
Tips for best results
- Note the MIME type before stripping it if you will need to rebuild the URI later.
- Pair with the add-prefix tool to reconstruct a data URI when required.
- Confirm the destination truly wants raw Base64 rather than a full data URI.
Common mistakes to avoid
Pitfalls to watch for
- Keeping the prefix where a system expects only raw Base64, causing it to fail.
- Losing track of the original MIME type, which the prefix carried.
- Pasting an incomplete URI, so the prefix is not recognised.
Benefits
Why people use it
Clean payload
Just the Base64, no wrapper.
Automatic
No manual trimming needed.
Private
Processed on your device — Remove Data URI Prefix.
Instant
Result appears immediately.
FAQ
Common questions
It removes the data:[mediatype][;base64], header from the front of a data URI, leaving only the raw Base64 payload after the comma.
Some APIs and storage formats expect the bare Base64 without the data URI wrapper. This strips it cleanly so you can paste the payload directly.
It is returned unchanged, so the tool is safe to run on input that may or may not include a prefix.
Yes. When a prefix is present, the detected MIME type is displayed so you know what was removed.
Private by design
This runs entirely in your browser
No file or text you enter here is uploaded. Encoding and decoding happen on your device using native browser APIs — close the tab and nothing remains on a server.