Compress image to 40 KB
Need a photo under 40 KB? Drop your image below and FileTinker compresses it to 40 KB or smaller right in your browser — nothing is uploaded. The target is preset to 40 KB, so just add your image and download.
More presets
Jump to another preset — each opens its own page ready to go:
How to compress an image to 40 KB
- Drag your JPG, PNG or WebP into the box above — it's read straight into your browser, never uploaded.
- The target is already set to 40 KB; FileTinker re-encodes the image until it fits at or under that size.
- Preview the result and download. If 40 KB is too small for this image, you're told clearly instead of handed a broken file.
About compressing to 40 KB
Compressing to 40 KB reduces a photo's file size by re-encoding it more efficiently and, when needed, lowering quality slightly — handy for upload limits, email attachments and forms that cap files at 40 KB.
Everything runs in your browser, so your image never leaves your device. JPG and WebP reach small targets like this most easily; very small targets may trade away some visible quality.
Frequently asked questions
How do I compress an image to 40 KB?
Drag your JPG, PNG or WebP into the tool above, leave the target at 40 KB, and press Compress. FileTinker shrinks it to 40 KB or under in your browser, then you download the result.
Will compressing to 40 KB reduce the quality?
Smaller targets mean more compression, so some quality is traded for size. FileTinker keeps the highest quality that still fits under 40 KB; if 40 KB is very small for a detailed photo, the tool tells you the closest size it could reach.
Are my images uploaded anywhere?
No. Compression happens entirely in your browser — your image never leaves your device and nothing is stored on a server.
Which formats can I compress to 40 KB?
JPG, PNG and WebP. The compressed file keeps its original format.