Compress Image — Reduce JPEG, PNG & WebP File Size
Reduce image file size without visible quality loss.
Image files are usually 60–90% larger than they need to be once you ship them somewhere — a website, a slide deck, a social post. Dropvert's image compressor brings them down to a sensible size without the visible quality loss most "auto-compress" buttons produce.
How it works
3-step walkthrough
How it works
3-step walkthrough
- 1
Drop a JPEG, PNG, WebP, or AVIF
Drag a file (or up to 20 at once) anywhere on the page or click the upload area. Files stay on your device — nothing is uploaded.
- 2
Tune quality, output format, or size limits
Pick a target format (or keep the original), set a quality slider, and optionally cap the longest edge. The estimated output size updates as you adjust.
- 3
Download — single file or zip
For one image you get a direct download. For multiple, Dropvert bundles them into a zip with consistent naming.
Why use Dropvert
Local-first, free, no upload required
Why use Dropvert
Local-first, free, no upload required
- Reduce file size by up to 80% on JPEG/WebP and ~50% on PNG without obvious artifacts.
- Run fully in your browser — no upload, no waiting on a queue, no server logs of your photos.
- Batch up to 20 images at once with the same settings.
- Strip EXIF metadata in the same pass so location and camera details don't leak.
- Convert format and compress in a single step (PNG → JPEG, JPEG → WebP, etc.).
Frequently asked questions
7 answered
Frequently asked questions
7 answered
- Is the image compressor free?
- Yes. Image compression runs in your browser and is free for everyone with no per-file or per-day limits.
- Do you upload my images to a server?
- No. Compression happens on your device using WebAssembly. The file never leaves your browser, which is why the tool works offline once the page is loaded.
- Will I lose quality?
- You can choose. Lossless modes (PNG output, or "same" output for already-lossy sources at quality 100) preserve every pixel. Lossy modes use perceptual encoding so the change is invisible at typical viewing sizes — pick a quality between 70 and 85 for a good balance, lower if file size is the priority.
- What's the file size limit?
- There's no hard limit imposed by the tool itself, but your browser's memory is the practical ceiling. On a typical laptop, single images up to ~100 MB compress fine; the bulk mode caps at 20 files per batch.
- Which format should I pick?
- WebP gives the smallest files at equivalent quality and is supported by every modern browser. JPEG is the safest universal choice for photos. PNG is the right answer when you need transparency or pixel-exact output. AVIF compresses even better than WebP but encoding is slower; keep it in reserve for photos where every kilobyte matters.
- Can I keep PNG transparency?
- Yes — output PNG or WebP and the alpha channel is preserved. Output JPEG and any transparent pixels become white (JPEG has no alpha channel).
- Why does my PNG barely shrink?
- PNG is already lossless and compresses on top of that, so a well-saved PNG has little slack. To get a meaningful size reduction, either reduce the dimensions, switch to WebP/AVIF, or convert to JPEG if the image has no transparency.
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