Compress JPG, PNG & WEBP Images
Drag a quality slider, watch the file size drop in real time, and download — free, in your browser.
How to compress an image
One slider, instant feedback.
Add your image
Drop in a JPG, PNG, or WEBP file
Drag the quality slider
See the live preview and new file size update as you drag
Download
Get your smaller JPEG, at the quality you chose
Why compress images with FileSeb
This tool runs the compression itself inside your browser using JavaScript — your photo never leaves your device. That also means you see the exact result before committing to it: drag the quality slider and the preview updates instantly, alongside the new file size, so you're never guessing what you'll get.
You choose the output format: JPEG for the smallest possible file (no transparency support), or WebP, which typically compresses smaller than JPEG at equal visual quality and preserves transparency if your source PNG has it.
What this tool actually does — and doesn't do
This tool shrinks an image by re-encoding it as JPEG or WebP at the quality you choose, and caps the longest side at 2400px — the two steps that actually remove weight from a modern phone photo, which can be several megabytes before compression.
Being honest about the trade-off: below roughly 90% quality this is a lossy process by design. No algorithm can keep every pixel identical and also make the file smaller — that's the fundamental exchange of image compression. If you need pixel-perfect reproduction (for print or archival), keep the original PNG instead and accept its size.
One more thing to know: images with transparency (like PNG logos) get a white background when saved as JPEG, because JPEG can't store transparency. Choose WebP or PNG output to keep transparency.
How to compress an image, step by step
- Add your image. JPG, PNG, WEBP, and HEIC (iPhone photos) are all accepted.
- Watch the live preview. The compressed result is shown against the original — judge quality with your own eyes before downloading.
- Move the quality slider. Lower means smaller files; the preview updates as you drag so you can find the point where quality loss becomes visible.
- Download. The app reports the exact before/after size so you know precisely what you saved.
Limits worth knowing
PNG files are recompressed as PNG (lossless) — big savings come instead from choosing JPG output. Photos compress far better than screenshots or line art; a clean photo routinely shrinks by 60–80% before any visible change appears.
Privacy
Compression is pure canvas math in your browser. No upload, no server, no copy left behind.
Questions about compressing images
It depends on the quality level you choose and the image itself. The tool re-encodes the image as a JPEG at your chosen quality (10-95%), and you can preview the result live before downloading, so you can find the smallest file that still looks acceptable to you.
Lower quality settings introduce more JPEG compression artifacts, which can show up as blur or blockiness at very low settings. The live preview shows you exactly what you'll get before you download, so there are no surprises.
Yes. You can upload JPG, PNG, or WEBP, and choose your output format too — JPEG for the smallest file size, or WebP, which usually compresses even smaller than JPEG at the same visual quality and keeps transparency if your source image has it.
No. Compression happens entirely inside your browser using JavaScript. Your images are never sent to a server.
→ Read the full guide: JPG vs PNG vs WebP — which to use
Related tools
- Image Resizer — change an image's pixel dimensions
- JPG to PDF — turn photos into a PDF document
- Compress PDF — shrink a PDF's file size