Image Compressor & Converter
Compress, convert and resize JPG, PNG, WebP and AVIF images right in your browser — nothing is uploaded.
Drop images here or click to choose
JPG · PNG · WebP · AVIF · GIF · multiple at once · no upload
🔒 No upload — images are processed only in your browser and never sent to any server.
How it works and what you can tune
Drop in one image or a whole batch — JPG, PNG, WebP, AVIF or even GIF — then choose an output format: WebP for a smaller web-ready default, AVIF for the tightest files, JPG for maximum compatibility, or PNG when you need lossless transparency. Leave it on Auto and the tool encodes to WebP for you. A single quality slider (default 80%) trades fine detail for smaller size on the lossy formats, while PNG stays fully lossless and ignores it. Flip on "Limit longest side" to cap resolution — say 1600px — and each picture is scaled down proportionally, aspect ratio intact. Press process and every result shows its new size beside the original, along with the exact percentage saved. Download files one at a time, or grab the whole set as a single ZIP.
When and why to reach for it
Shrink a folder of 5 MB phone photos before emailing them or squeezing them under a job portal's or forum's upload cap. Replace heavy PNG screenshots with WebP so a page loads faster and clears its Core Web Vitals budget. Batch-convert a product gallery to AVIF to cut bandwidth with no visible drop in quality. Scale oversized camera shots down to a sensible 1920px before posting to a blog or a marketplace listing. Because you can queue dozens of files and apply one format and quality to all of them at once, it's just as handy for prepping icons, thumbnails and attachments in bulk. There's no desktop app, plugin or sign-up, and it behaves the same on a phone, a laptop or a locked-down work machine.
Private by design, quality you control
Unlike most online converters, this tool never sends your pictures anywhere. Decoding, resizing and re-encoding all run locally in a Web Worker on your own device, so sensitive images — ID scans, contracts, personal photos — stay with you, and everything keeps working with the connection switched off. Location data and other EXIF metadata are stripped by default, so you won't accidentally reveal where a shot was taken. On quality, 70–80% is usually the sweet spot for the web: hard to tell from the original, yet far lighter. Watch the live savings figure and nudge the slider until size and sharpness sit where you want them. Browsers without native AVIF encoding (Safari, for one) fall back to a built-in WebAssembly encoder, so AVIF stays available everywhere.
Frequently asked questions
Are my images uploaded to a server?
No. Decoding, resizing and re-encoding all happen inside your browser, so your files never reach a server — the tool even keeps working offline. That makes it safe for ID scans, contracts and private photos, and location/EXIF metadata is removed by default.
Which format should I pick, and does AVIF work everywhere?
WebP is the best all-round default — roughly 25–35% smaller than JPG at the same quality. Choose AVIF for the smallest files, JPG for the widest compatibility (no transparency), or PNG for lossless logos and icons. AVIF is always selectable: browsers without native support, such as Safari, fall back to a built-in WebAssembly encoder.
Can I compress a whole batch at once?
Yes, with no count limit. Add many images, convert them all with one format and quality setting, then download each file individually or the entire set as a single ZIP. Processing runs on your device, so speed scales with your hardware.