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Resize your left thumb impression

Some application forms ask for your thumb impression as an image. Take a photo of it on paper: we clean it up and compress it to your form's limit.

Thumb impression

Removes shadows and grey paper from a phone photo. The result is in black and white.

Size limit

We keep the file just under the limit, counting 1 KB as 1,000 bytes, so it passes on every portal.

More options: exact pixel size, DPI

We crop from the centre to match this shape, so faces never get stretched.

It changes the label inside the file, not the pixels.

Your result appears here

We check the size against your limit before you download. Nothing is uploaded.

Getting it right

  • Press your thumb on a blue or black stamp pad, then once, firmly, on plain white paper. Don't smudge it.
  • Use the thumb your form asks for. Most ask for the left thumb.
  • Take the photo in daylight, straight from above, and crop close to the impression.
  • If your form gives a pixel size or DPI, enter it under More options.
  • Clean-up makes the result black and white with a white background. If your form wants the original colours, untick it.

How it works

  1. Choose your photo. A JPG, PNG or WebP from your phone or computer.
  2. Type the limit from your form. If it says “between 20 KB and 50 KB”, enter 20 and 50.
  3. Download. You get a JPG that fits, usually within a second or two.

Your photo never leaves your device

The compression runs inside your browser. Your photo is not uploaded to any server, so nobody else can see it. That matters for ID photos and signatures. See how to check it yourself.

Tips for application forms

  • Copy the numbers exactly as the form states them. Forms reject a file that is even 1 KB over the limit.
  • If the form gives a pixel size, such as 350 × 450, open More options and enter it.
  • If the form mentions 300 DPI, enter 300 in the DPI box. It changes a label inside the file, not the photo.
  • For a very small limit, crop the photo close to the face or signature first. Less background leaves more detail for what matters.

Questions

Will my photo lose quality?

Some, as with any compression. We test several combinations of pixel size and quality and keep the one that looks best while staying under your limit.

Why is the file a little under my limit?

We aim for 95–100% of the limit, so the file is never over it. A form will accept 48 KB when the limit is 50 KB.

My form needs at least 20 KB. Can you make a file bigger?

Yes. Enter the minimum in the first box. If the photo is too small, we raise the quality first. If it is still under, we add harmless padding inside the file. The photo looks exactly the same.

What does the exact pixel size option do?

It resizes the photo to those pixels. If the shape is different, we crop from the centre so nothing gets stretched.

Which files can I use?

JPG, PNG and WebP. The result is always a JPG, which every form accepts.

Is it free?

Yes. There is no sign-up and no watermark.

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