Compress images for the web without uploading them
How browser-based compression keeps photos private while still cutting file size for faster pages.
Heavy images are still one of the most common reasons a page feels slow. Shrinking JPG, PNG, and WebP before you publish is usually a bigger win than another caching tweak — especially on mobile networks.
Most online compressors upload every file to a remote server. That is convenient, but it also means product shots, portraits, and unpublished drafts leave your device even for a quick experiment. Browser compression skips that step: the file is decoded, re-encoded, and downloaded in the tab.
What actually gets smaller
Lossy formats (JPG, WebP) shrink when you lower quality or pick a more efficient codec. PNG shrinks less because it is lossless — you are mostly stripping metadata or converting away from PNG. Camera photos and screenshots that were never optimized usually drop 40–80%. Files that already went through a CDN optimizer may barely move.
- Start around 70–80% quality for photographs.
- Try WebP when the destination (your site, a modern CDN) accepts it.
- Keep a master original if you will crop or color-correct later.
- Compare the live preview at 100% zoom on faces and text, not just the kilobyte count.
When in-browser compression is the better default
Use it when the photo is unpublished, contains people, or belongs to a client. Filvo’s compressor re-encodes with Canvas on your device. You set quality, optionally convert formats, preview the result, and download — without creating a cloud gallery of uploads.
Dedicated landings lock a starting point: JPG for the web, a gentler quality slider, or a WebP destination. Same engine, less hunting through settings.
Steps
- Open the compressor. Drop a JPG, PNG, or WebP into Filvo’s image compressor.
- Set quality. Start near 75% and watch the preview plus the new file size.
- Download. Save the smaller file and keep the original if you still need it.
Ready to try it? Compress a JPG for the web.