exactkb
Hit the exact KB. Every form. Every time.

Compress an image to the exact KB your form asks for

Photos and signatures, resized to a precise size limit for exam and government uploads — right here, without uploading anything.

Drop a photo or tap to choose JPG, PNG, WebP or iPhone HEIC. Nothing is uploaded — it all runs in your browser.
Target size
Set exact pixels (optional)
Compressed image preview
Original—
Result—
Pixels—
——
Download image

100% private — your photo never leaves this device.

Compress to an exact size

Pick the limit your form asks for.

5 KBTiny signature and thumbnail uploads on state portals.10 KBSignature fields on many SSC and railway forms.15 KBA common photo ceiling on older exam portals.20 KBThe NSDL/PAN and RRB standard — the single most-requested size in India.25 KBFrequent photo limit on banking (IBPS/SBI) applications.30 KBPhoto uploads on several PSC and university portals.40 KBA widely used passport-photo ceiling across govt forms.50 KBOne of the most common photo limits on recruitment portals.100 KBDocument, marksheet and certificate uploads.150 KBHigher-quality photo slots and scanned documents.200 KBCertificate and category-proof uploads.300 KBScanned multi-page proofs and higher-res photos.500 KBDetailed scans where portals allow more headroom.1 MBFull-resolution documents and high-quality photos.2 MBThe upper bound many portals accept for supporting docs.

How it works

  • Choose your photo or signature — or just drag it onto the box above.
  • Tap the exact size your form needs, like 20 KB or 50 KB.
  • The tool lands on that size and shows you the result versus the limit.
  • Download the ready-to-upload JPG. Nothing ever leaves your device.

Questions

How do you hit an exact KB size?

The tool compresses your image, checks the file size, and adjusts quality up or down repeatedly (a binary search) until it lands at or just under your target. If even the lowest quality is too big, it gently reduces the pixel dimensions and tries again.

Is my photo uploaded anywhere?

No. All processing happens inside your browser on your own device. Your photo is never sent to a server, so it stays private and works even on a slow connection.

Does it work with iPhone HEIC photos?

Yes. HEIC and HEIF files are converted to JPG automatically before compressing, so they upload cleanly to portals that only accept JPG.

Will the photo lose quality?

Some quality is traded for size — that's unavoidable when a form demands a small file. The tool keeps quality as high as the size limit allows, and flattens transparency to a white background so it looks correct on official portals.

Is it really free?

Yes, completely free, with no sign-up, no daily limit and no watermark.