Image Resizer
Resize JPG, PNG, WebP, AVIF images to any dimensions. Browser-side, your image never uploads.
Resize JPG, PNG, WebP, AVIF images to any dimensions. Browser-side, no upload, no quality loss for downscaling.
Image Resizer is the Swiss-army knife for everyday image work — uploading a profile photo to a service that demands exactly 400×400, shrinking a 4000px screenshot for an email, or matching the dimensions specified by a job application portal.
Pick Rack's Image Resizer runs entirely in your browser using the Canvas API. Your image is loaded into a <canvas>, resized with high-quality bilinear interpolation, and re-encoded — all without leaving your device. No upload, no server processing, no data retention. Free, no signup, no watermark.
Supports JPG, PNG, WebP, and AVIF. Lock aspect ratio toggle prevents distortion. Output format can be the same as input or converted (great for swapping a heavy PNG screenshot to a light WebP).
Key features
- Browser-side privacy — Image stays on your device. Canvas API does the resize, then encodes to JPG/PNG/WebP — never touches a server.
- Aspect ratio lock — Toggle on to keep proportions; off to crop or stretch to exact dimensions.
- Multi-format support — Input: JPG, PNG, WebP, AVIF, GIF. Output: same format or convert (WebP usually gives best size).
- High-quality downscale — Browser bilinear/lanczos resize. For typical web use, output is visually indistinguishable from professional desktop apps.
- Free, no watermark — Output image has zero added marks. No premium tier, no daily quota.
How to use
- Step 1: Drop your image — Drop a JPG/PNG/WebP/AVIF (up to ~50MB practical) into the upload zone, or click to browse.
- Step 2: Set width and height — Type new dimensions in pixels. Toggle aspect-ratio lock if you want proportions preserved.
- Step 3: Choose output format — Keep the original format or switch to WebP for ~30% smaller files at same quality.
- Step 4: Download — Click Resize, then Download. The processed image is saved to your device.
When to use
- Match a profile photo size required by LinkedIn (400×400), Slack, GitHub
- Shrink a screenshot before emailing — 4K screenshots are usually 8MB, resized 1080p is ~500KB
- Match a job application portal that demands exact dimensions
- Prepare a thumbnail for YouTube (1280×720), blog post, or marketplace listing
- Resize photos for a passport application (often 600×600 px requirement)
- Compress a logo for a website without uploading to TinyPNG
Frequently asked questions
Is my image uploaded to your server?
No. The image stays in your browser memory. Canvas API does the resize locally, you click Download, and the file goes to your device. Verify in DevTools → Network tab — no upload requests fire.
What's the maximum image size I can resize?
Practical limit is ~50MB or ~10000×10000 pixels — beyond that, browsers may slow down or run out of memory. For larger images, use a desktop app like ImageMagick.
Will the output have any quality loss?
Downscaling (e.g., 4000×3000 → 1920×1440) is essentially lossless to the human eye. Upscaling produces visible blur — for AI upscaling, see Image Upscaler tool. JPG re-encoding adds minor artifacts; choose WebP or PNG for lossless re-encode.
Does this preserve EXIF metadata (camera, GPS)?
No — Canvas API resize strips EXIF. This is actually a privacy benefit: your camera/location data is removed from the output. To preserve EXIF, use a desktop tool like ImageMagick or exiftool.
Can I resize multiple images at once?
v1 supports one at a time. Batch resize is on the roadmap. For now, you can run multiple browser tabs in parallel — each is independent.
Why is my output JPG larger than expected?
JPG quality defaults to 92 (high). For smaller files, change output to WebP (~30% smaller) or PNG (lossless, larger but no artifacts). For aggressive compression, also use Image Compressor afterward.
Can I resize images directly on my phone?
Yes, on any modern mobile browser (Chrome, Safari, Firefox). For very large source images (over 20MB), mobile may slow down — desktop is faster.
Can I crop instead of resize?
Use Image Cropper (coming soon). Image Resizer scales the entire image proportionally; cropping cuts a region.