Compress Image to 15KB

Reduce your photo or signature size to under 15 KB for exam, job and government forms. The 15 KB target is already set, so just add your image.

Under 15 KBJPG Runs on your device

Compress to 15KB · Step 1 of 3 · Add your photo

Drop a photo to compress it under 15 KB

or paste with Ctrl+V · JPG PNG WebP HEIC GIF · max 25 MB

Under 15 KB · JPGBatch ready

Processed on this device. Nothing is uploaded.

Example

Before and after

We ran this sample through the compress to 15kb tool above. The numbers under each image are measured from the real files.

Sample input: 5472 x 3648 px · 1.5 MB · JPG — **Before**5472 x 3648 px · 1.5 MB · JPG

Result from this tool: 657 x 438 px · 14.6 KB · JPG — **After**657 x 438 px · 14.6 KB · JPGThe actual file the tool made

How to

How to compress Image to 15KB

1.
Add your photo. Drop it, paste it or take one with your camera.
2.
Keep the 15 KB target. The size is already set to 15 KB. Change it only if your form asks for a different limit.
3.
Download. Download the file and attach it wherever you need it.

Why this size

Why do forms ask for photos under 15 KB?

Exam boards, job portals and government sites receive millions of uploads. A 15 KB cap keeps their servers fast and their records small, so the form simply rejects anything bigger.

A phone photo is usually 2-5 MB. Getting it under 15 KB means lowering the quality and, if needed, the dimensions, done carefully so the face or signature stays clear. That is exactly what this tool does for you.

Upload	Typical limit
Exam photo	10-20 KB
Signature	10-20 KB
Thumb impression	10-20 KB
Job portal photo	20-50 KB

Use cases

When you need a 15 KB photo

Exam registration

Board, university and entry test forms that cap photos at a few KB. The exam kit knows the rules of the big exams.

Signature uploads

Scanned signatures that must stay between 10 and 20 KB; signature resize also crops them to 140 x 60 px.

Government ID forms

National ID, licence renewals and other strict portals.

Thumb impressions

Fingerprint scans for admission and recruitment forms.

Scholarship applications

Online applications with very small upload caps.

Slow connections

A photo that sends instantly, even on weak mobile data.

Tips

Tips that make a difference

Crop first

Cropping to just the face or document removes pixels you do not need, so the quality can stay higher.

Use JPG

JPG gets much smaller than PNG for photos. Use PNG only if the form asks for it.

Check the dimensions too

Some portals also require a size such as 3.5 x 4.5 cm or 200 x 230 px. Set both to avoid a second rejection: resize in cm or in pixels first, then compress.

Plain backgrounds compress better

A plain wall behind you leaves more of the 15 KB for your face.

Do not go far below the limit

A file that is much smaller than needed loses detail for nothing. Aim just under the limit.

FAQ

Compress to 15KB: questions

Add your photo above and download the result. The 15 KB target is already set: the tool lowers the JPG quality step by step, and the pixel size only if it must, until the file is just under 15 KB.

Open this page in Chrome or Safari, tap to pick a photo or take a new one, then download. It works on Android and iPhone with nothing to install.

Yes. Phone photos are usually 2 to 5 MB, about 2,000 to 5,000 KB (the MB to KB converter explains the units). The tool reduces the pixel size as well as the quality when it has to, so even a large photo gets under 15 KB.

At 15 KB a passport style photo or signature stays clear. Group photos and landscapes lose more detail, so crop them first.

The result lands just under the limit, usually within a few percent of 15 KB, so the form never rejects it for being too big.

Add a PNG, HEIC, WebP or JPG photo. The result is always a JPG just under 15 KB, so converting and compressing happen in one step.

No. Compression runs in your browser on your own device. The photo never reaches our servers.

A JPG. Almost every form accepts it, and it gives the smallest files for photos.

Checked

How we checked this page

Checked by the SizePort team on 3 October 2026.

We test the tool with sample photos before it goes live and check that the sizes on this page match what it produces. Rules and platforms change, so if something here is out of date, tell us and we will correct it.

How the tool works

The compressor first lowers the JPG quality at full resolution, testing several settings until the file is just under the target. Only if quality alone cannot get there does it reduce the width and height, a little at a time. The result is a JPG. Everything happens in your browser; your images are never uploaded.