Image Size Reducer
Prepare a photo for a form that sets a file-size ceiling, such as 50 KB, 100 KB, 200 KB or 500 KB. A KB limit is different from a width or height requirement: a 600-pixel photo can still be too large in bytes. Start with the required dimensions, choose the closest supported size ceiling below the form limit, then inspect the downloaded JPG before submitting it.
Before you start
How do I reduce a photo to an upload size limit?
Choose a target such as 50 KB, 100 KB or 200 KB. The tool adjusts JPEG quality and, when needed, reduces pixel dimensions to approach that limit. The output is JPG: inspect fine text and confirm the downloaded file meets your form requirements.
If the form specifies width and height, resize the image first. See the online-form photo guide for the full sequence.
🔒 This file is processed on your device. Nothing is uploaded to any server.
Example: a photo under 100 KB
If a form asks for a photo no larger than 600 pixels wide and strictly under 100,000 bytes, resize to 600 pixels first. Our 100 KB preset uses 102,400 bytes, so that preset alone does not prove compliance with a decimal-byte limit. Check the final file size; use the 50 KB preset if the file remains too large. Check that text and facial details are still readable.
How to reduce an image's file size
- Select your photo (or several at once).
- Pick the target size — 50, 100, 200 or 500 KB.
- Download the reduced image.
When you'd use this
- Uploads that get rejected — A form that refuses your photograph because it exceeds the size it allows.
- Slow connections — Sending pictures over a weak or metered mobile signal.
- Freeing up space — Trimming a folder of photographs before backing them up or emailing them.
- Attachment limits — Getting several images under a mail service's total size cap.
Good to know
- It is the same tool as Compress Image — This page and Compress Image run identical code. Two names exist because people search for both, not because they behave differently.
- You choose the ceiling — The tool finds the best quality that still fits under the size you picked, so you never have to guess at a percentage.
- Width and height do not change — Only the file size is affected. To reduce the actual pixel dimensions, use Resize Image.
- Small targets cost real detail — Squeezing a large photograph into 50 KB visibly softens it. If the form permits more, take the larger allowance.
Frequently asked questions
How is this different from Compress Image?
It's the same tool under a different name — both bring a photo under a size limit you choose.
What if my photo can't reach the target size?
Pixel dimensions are reduced as a last resort, and you're told plainly if it still couldn't fit under the limit.
Is this different from Compress Image?
No. They are the same tool under two names, because "reduce image size" and "compress image" are both common ways of asking for exactly the same thing. Use whichever page you happened to find.
How small can a photo actually go?
The smallest preset is 50 KB. Signatures and scanned pages reach it comfortably; a detailed photograph pushed that far will look noticeably soft.
Does it work on PNG files?
Yes, though the result is saved as a JPG, because that is what makes the large savings possible. If you need transparency preserved, keep the PNG instead.