Compress images without uploading them anywhere
Most online image compressors send your photos to a server. Dropsize does not. Every image is compressed locally in your browser using WebAssembly — your files never leave your device, so there are no uploads, no waiting, and no privacy trade‑offs.
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How it works
1. Pick one or more images from your device. 2. Choose a format (JPG, PNG, WebP or AVIF), quality and optional resize. 3. Dropsize compresses everything on‑device and shows the before/after size. 4. Download individually or as a single .zip.
Why on‑device compression is better
Because nothing is uploaded, Dropsize works with sensitive images — ID documents, contracts, medical scans, private photos — without exposing them to any server. There is no file‑size cap imposed by an upload limit, and it stays fast even for large batches.
Formats and features
Compress and convert between JPG, PNG and WebP; export AVIF on the web for the smallest files. Resize by max width/height or percentage, keep or strip EXIF metadata (including GPS), batch‑process many images at once, and rename outputs with a prefix like “Trip_1, Trip_2…”.
Frequently asked questions
Are my images uploaded to a server?
No. All compression runs locally in your browser. Your images never leave your device.
Is it free?
Yes, Dropsize is free to use in the browser with no account required.
What image formats are supported?
JPG, PNG and WebP everywhere; AVIF export is available on the web.
Is there a file size or count limit?
No upload limit — because files are processed on your device, you can compress large images and big batches.
Does it work on phone and desktop?
Yes. Dropsize runs on the web, and as a native app for iOS and Android.
Compress your images now →