Image Compressor
Compress images online free. Shrink JPG, PNG or WebP photos with a quality slider or a target size in KB (e.g. under 200 KB). No upload.
The 10-second test: switch off your Wi-Fi (or turn on airplane mode) and use this tool anyway. It keeps working — because there is no server doing the work.
The technical check: open your browser's developer tools, go to the Network tab, and run the tool. Your file is never sent anywhere.
Measured live on this page — files transmitted: 0 · file data sent: 0 bytes
This counter hooks the browser's own networking functions, so it would rise the instant any file data left this page. The only thing this site ever transmits is the contact form, if you choose to send one.
Select files
or drag & drop — pasting works too (Ctrl+V)
Working…
Your file is ready!
Processed on your device — 0 bytes uploaded
Thanks — feedback received!
How to compress an image
Add your images and either pick a quality level or set a target size — like "under 200 KB" for job portals, visa applications and website forms with upload limits. Photos typically shrink 60-90% with no visible difference.
Two ways to compress
By quality — pick a level and see what size you get. Good when you want the image to look a certain way and the file size is flexible.
By target size — name a number of kilobytes and the tool works out the quality needed to land under it. This is what you want when a form says "maximum 100 KB" and simply will not accept 101.
Why JPG compresses so much better than PNG
They are built for different things. JPG discards detail the eye is bad at noticing, which works brilliantly on photographs. PNG is lossless, so a photograph saved as PNG can be five times larger for no visible benefit. If your photograph is a PNG, converting it to JPG often does more than any amount of compression.
The reverse also holds: screenshots, logos and diagrams belong as PNG. Compressing those as JPG produces visible fuzz around text and hard edges.
What to expect at low sizes
Heavy compression shows up first in flat areas — skies and skin develop faint blocks and banding — and around sharp edges. Photographs tolerate it well. Images containing text do not, which is why a screenshot squeezed to 20 KB looks far worse than a landscape at the same size.
Exact targets
20 KB · 50 KB · 100 KB · 200 KB
Quick presets
Frequently asked questions
How do I compress an image to a specific size like 100 KB?
Choose "Target size", type 100, and compress — the tool automatically finds the quality (and, if needed, dimensions) that fit under your limit.
Does compressing reduce quality?
Some quality is traded for size, but at moderate settings the difference is invisible on screens. You always see the before/after sizes.
Which formats can I compress?
JPG, PNG and WebP go in; optimized JPGs come out — the best format for small photo file sizes.
Why is my PNG so much bigger than a JPG?
PNG is lossless and stores every pixel exactly. For photographs that is wasteful — converting to JPG usually shrinks the file dramatically with no visible difference.
What gets worse when I compress heavily?
Flat areas such as skies develop banding, and sharp edges pick up fuzz. Photographs cope well; images containing text do not.
Can I hit an exact file size?
Yes. Choose the target-size mode, name your limit in kilobytes, and the quality is worked out to land under it.