Image Resizer & Compressor
Guide & FAQGuide: Image Resizer & Compressor
How to resize or compress an image
Drop a picture onto the page, choose one with the button, or paste an image from your clipboard. Then pick what you need. For a target file size, switch on Limit file size and type a number, for example 50 KB. For an exact size, choose Custom size and enter the width and height. The result updates live, with the before and after file sizes and a preview, and Download saves it.
Target file size (KB)
Forms for exams, visas and job sites often demand a photo under 20, 50 or 100 KB. In JPG and WebP the tool searches for the highest quality that still fits your limit. If the picture cannot reach the limit even at low quality, it can also shrink the dimensions a little. PNG is lossless, so to reach a small size the tool reduces the number of colours first and shrinks the picture only as a last step.
Exact pixels, passport and ID photos
Choose Custom size and enter pixels, or millimetres, centimetres or inches together with a DPI value. The Passport 35 x 45 mm preset gives 413 x 531 pixels at 300 DPI. With Keep aspect ratio off you decide how the picture fills the new shape: Crop to fill trims the edges, Fit inside adds white bars, Stretch distorts.
Which format to choose
- JPG is the safest choice for photos and works everywhere.
- WebP is usually smaller at the same quality, but a few old sites reject it.
- PNG keeps sharp edges and transparency, best for logos and screenshots, but photos make large files.
FAQ
Are my images uploaded anywhere?
No. The image is opened and re-encoded by your browser, and nothing is sent to a server.
Why is my result slightly below the KB limit I set?
The tool picks the best quality that stays at or under your limit, so the file is a bit smaller than the limit rather than a bit larger. Forms usually reject files over the limit.
Can I make a small file bigger, for example exactly 100 KB?
Compression can only make files smaller. If your picture is already below the limit you get the picture at your chosen quality. Raising the quality slider with Limit file size off creates a larger file.
Why does my PNG not get much smaller?
PNG has no quality setting. Photos contain millions of colours and compress badly as PNG. Switch to JPG or WebP, or let the tool reduce colours by setting a KB limit.
Does it keep transparency?
PNG and WebP keep transparency. JPG cannot, so transparent areas become white.
What picture formats can I open?
Anything your browser can display, usually JPG, PNG, WebP, GIF, BMP and AVIF. HEIC photos from some phones need converting first.