Resize and compress a thumb impression for online forms
Prepare a thumb-impression scan or photo with square starting sizes, custom dimensions, automatic whitespace trimming, background cleanup and a maximum file-size target. Your original image stays on your device.
1. Select thumb impression(s)
JPG, PNG or WebP · up to 15 MB each · up to 20 files · direct individual downloads
No thumb impressions selected
Start with a square canvas or use the exact requirement
Trim blank margins and choose the background
Keep the complete thumb impression inside the output box
Drag the prepared image, pinch or zoom, and review the final framing before processing. The starting crop is only a suggestion.
Source preview
Prepared preview
Total input size
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Result
Not processed yet
Privacy
Thumb-impression images are processed locally in your browser; the source file does not need to be uploaded.
Prepare thumb impressions without uploading the source image
Use the tool when an online form asks for a scanned or photographed thumb impression with strict file dimensions or a maximum upload size. Start with a square canvas or enter the exact dimensions specified by the form.
Trim before compressing
A tight crop usually makes better use of a fixed canvas than shrinking a large page photograph containing unused paper. The framing editor then lets you reposition the impression before compression, so an off-centre thumb is not silently cut in half.
Target file size
The file-size setting is a maximum goal, not a guarantee that every image will land on an exact byte count. Simple black-on-white impressions usually compress more efficiently than noisy photographs or textured paper.
Related tools
Left thumb impression resizer for forms
Common searches include thumb impression resizer, left thumb impression resize and thumb impression to 20KB or 50KB. Use the exact dimensions, format and maximum file size stated by the receiving application rather than assuming a universal specification.