How do I reduce an image to a specific size in KB?

Upload the image, pick a limit (or type your own) and click Compress. The tool tries different JPG quality levels and keeps the best one that fits under your limit.

What is the smallest size I can compress to?

Around 5-10KB works for signatures and small photos. For a clear face photo, 20KB or more gives noticeably better results.

Can I resize a photo in cm for a form?

Yes. Choose Centimetres + DPI and enter the size and DPI from the form. The tool converts it to pixels, crops to that shape and writes the DPI into the file.

Why is the output a JPG?

JPG is accepted by virtually every form and is the only common format whose size can be tuned precisely. PNG files of photos are far larger.

Is my photo uploaded anywhere?

No. Compression runs entirely in your browser; nothing is sent to a server.

Yes. No signup, no watermark and no limit on use.

Compress Image to KB

Reduce any photo or signature to the exact KB limit an online form asks for - 10KB, 20KB, 50KB, 100KB or any size you type. Set pixels or centimetres with DPI when the form requires them. Free, private, no signup.

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Features

Any limit: 10KB, 20KB, 50KB, 100KB, 200KB or custom
Finds the highest quality that still fits the limit
Exact size in pixels or centimetres, with DPI written into the file
Whiten-background option for scanned signatures
Shows the final KB and dimensions before you download
100% private - the image never leaves your browser
No signup, no watermark, works on phone and laptop

Where a Fixed KB Limit Comes Up

Exam and Job Applications

Recruitment and exam portals cap the photo and signature upload, often with fixed dimensions too.

Admission and Scholarship Forms

College and scholarship forms reject images above their limit. Compress once and upload.

Government Services

Online service portals set strict size caps on every photo and document image.

Email and Chat

Small images send and open instantly on slow connections.

How to Hit an Exact KB Limit

Why forms set a KB limit

Application portals receive huge numbers of photos, so they cap each upload - commonly somewhere between 10KB and 200KB - and often fix the pixel dimensions too. A phone photo is usually 2-5MB, far above any of these limits.

The tool redraws the photo as a JPG and searches for the highest quality that fits your limit, so the face or signature stays as sharp as the size allows.

Common limits

Compress image to 20KB - frequent limit for photos on exam and recruitment forms.
Compress image to 50KB - a common upper limit for photos.
Compress image to 100KB - document images and larger photos.
Signature resizer - signatures, usually 10-20KB, with background clean-up.

Pixels, centimetres and DPI

If the form gives pixel dimensions, choose Pixels and enter them. If it gives a physical size such as 3.5 x 4.5 cm, choose Centimetres + DPI; the tool converts it to pixels and writes the DPI into the JPG. The photo is centre-cropped to the required shape.

For printed photos rather than uploads, use the passport size photo maker, which lays out a ready-to-print sheet. For PDFs, use Compress PDF to Exact Size.