Image Resizer
AboutNotes
Privacy
- Everything happens in your browser. The file you pick is never uploaded — there's no server to upload it to.
- EXIF metadata (camera info, GPS coordinates) is stripped during the re-encode. The output won't carry your phone's location data.
How it works
- HEIC files (iPhone) are decoded via a small library loaded only when you pick one — non-HEIC users skip the download.
- Hermite resampler for downscaling — produces noticeably less aliasing than the browser's native resize at large reductions. Adapted from viliusle/Hermite-resize (MIT).
- WebP output is significantly smaller than PNG for photos — try 70-85% quality for a good balance.
Limits
- Max input size: 20 MB.
- One image at a time. Batch coming later.
- Big photos (4000+ pixels) can take a second or two on mobile — the resize runs on the main thread for now.
Lossy compression discards information you can't recover. Keep the original file if it matters — e.g. for prints or further edits.
Frequently asked questions
How do I resize an image without losing quality?
Drop an image and set a new width or height (lock the aspect ratio to avoid stretching). This tool downscales with a high-quality Hermite filter, which keeps edges sharp and avoids the mushy look of a plain browser resize. Everything runs on your device.
How do I compress an image to a smaller file size?
Export as WebP or JPG and adjust the quality slider — the live preview shows the resulting file size as you change it, so you can hit a target size (for example, under 1 MB for an upload) without guessing.
Can I convert HEIC photos from my iPhone to JPG or PNG?
Yes. Drop a HEIC file and export it as JPG, PNG or WebP — handy because many sites and apps will not accept Apple’s HEIC format directly.
Can I crop the image too?
Yes — there is a crop tool with a visual region picker, so you can crop and resize in the same pass before exporting.
Is it free, and are my photos uploaded to a server?
It is free with no signup or watermark, and nothing is uploaded — resizing, cropping, compression and format conversion all happen in your browser, so your photos never leave your device.