Image Compressor
Shrink any image with a quality slider and size cap.
How to use Image Compressor
Compress JPG, PNG or WebP images. Set a quality and a max size, then download the smaller file.
Open Image Compressor on toolpermarket, then enter the values you want to work with.
In the Image file field, choose the JPG, PNG, or WebP you want to shrink. Bigger originals save more; a phone photo often drops 60-80%.
In the Quality field, a 10-100% slider controlling how much detail is kept (JPG/WebP). 70% is the sweet spot for photos; drop to 50% only for thumbnails.
In the Max dimension field, the largest width or height in pixels after scaling. 1280 keeps most screens happy while cutting file size sharply.
Press Compress to compute the result. The output appears immediately below the form. Tweak any field and run it again to check a different scenario.
Read the result and use it as needed. If the number looks off, re-check your inputs and run it again — the math is deterministic, so the same entries always return the same answer.
Worked example. Load a 4 MB photo, set quality 70% and max 1280 px, and download a ~400 KB JPG that still looks crisp on screen.
Tips for accurate results.
Lower quality and a smaller max dimension compound, so both together shrink fastest.
PNG output is lossless, so size drops come mainly from the dimension cap.
The file never uploads — compression runs on the image you selected, in the tab.
When to use Image Compressor. Emailing or uploading photos that exceed a size limit. Speeding up a page by shipping lighter images. Prepping screenshots and graphics for docs or slides.
When you actually reach for this
- You need to shrink a photo for email, a form upload, or a website without installing software.
- A file is rejected for being over a size limit and you want the smallest version that still looks acceptable.
Where this tool stops being accurate
- Re-compressing an already-compressed JPEG adds generational loss; compress once, from the original, not from a JPEG you already saved.
- A quality slider trades detail for size; pushing it low on a detailed photo leaves visible blockiness.
Frequently asked questions
Where does my image go when I compress it?
Nowhere but your browser. The file is read locally, redrawn on a canvas, and re-exported on the device — it is never sent to a server, stored, or shared.
Will the compressed image look worse?
At 70% quality the difference is usually invisible on screen; you trade a little fine detail for a much smaller file. Slide quality down only as far as you can still accept the result.
Why is my PNG not much smaller?
PNG is lossless, so a PNG-to-PNG pass only saves space by reducing dimensions. For big savings on photos, switch the target to JPG or WebP, which compress with quality loss.
Will compressing ruin my photo?
Lossy formats (JPEG/WebP) drop fine detail at low quality but look fine at moderate settings. PNG is lossless and will not change a pixel, though it shrinks far less.
Can it compress a PDF or a video?
No. This handles single raster images only. Use a dedicated PDF or video tool for those.