Resize Image to 30 KB: Free Online Compressor

30 KB is a common cap for exam signatures and some state exam photos. On this site the CTET signature (3 to 30 KB), the UPPSC and APPSC signatures (under 30 KB) and the Kerala PSC photo (under 30 KB, 150 x 200 pixels) all stop at 30 KB. This page starts the compressor at 30 KB.

1 Choose what the photo is forTarget file size (KB)

Keeps your photo's shapemax 30 KB

2 Add your photo

Drop a photo here or tap to choose
JPG, PNG or WebP · you can also paste (Ctrl+V)

Your photo stays on your device. Face detection and background removal also run on your device.

The tool saves a JPG at high quality first and lowers the quality only as far as needed, keeping the highest quality that still fits. It shrinks the pixel size only if even the lowest quality is over 30 KB. Images wider than 1600 pixels are scaled down to 1600 first.

Some forms use 30 KB the other way round, as a minimum: the RRB NTPC signature must be 30 to 49 KB and the India Post GDS photo 30 to 100 KB. Do not use this page for them. Their own pages keep the file above 30 KB, adding empty JPEG comment data when the image is too small, without changing the pixels.

How to compress an image to 30 KB

Target file size is already set to 30 KB. Change it if your form gives a different limit.
Pick the photo or scanned document.
Check that the file size line shows ✅, then tap Download.

If the form also gives a pixel size, use its own page instead so the shape is right too, for example the SSC photo or IBPS signature tools, or browse all exam photo and signature sizes.

Forms on this site with a 30 KB limit

These applications accept files up to 30 KB. Some also set a minimum and a pixel size, so their own page is the safer choice.

Form	Pixels	File size
CTET Exam Signature	350 x 150	3 to 30 KB
UPPSC Exam Signature	600 x 300	under 30 KB
APPSC Exam Signature	350 x 150	under 30 KB
Kerala PSC Photo	150 x 200	under 30 KB

Other KB tools

Common mistakes

Using this page for RRB NTPC or India Post GDS, where 30 KB is the minimum, not the maximum.
Reusing an SSC signature (6.0 x 2.0 cm) for UPPSC, which asks for a taller 6 x 3 cm box.
Cropping off the name and date strip at the bottom of a Kerala PSC photo.

Frequently asked questions

How do I compress an image to 30 KB?

Pick the image on this page; Target file size is already 30 KB. Check that the file size line shows ✅, then download the JPG.

Which forms have a 30 KB limit?

On this site: the CTET signature (3 to 30 KB, 3.5 x 1.5 cm), the UPPSC signature (under 30 KB, 6 x 3 cm), the APPSC signature (under 30 KB, 3.5 x 1.5 cm) and the Kerala PSC photo (under 30 KB, 150 x 200 pixels). The table below links to each one.

Can a file be too small for these forms?

For CTET, yes: the signature must be at least 3 KB. UPPSC, APPSC and Kerala PSC give only a maximum. RRB NTPC is the opposite case, with a 30 KB minimum.

Is my photo uploaded to a server?

No. Resizing, compression, face detection and background removal all run inside your browser. The photo never leaves your device and nothing is stored.