Free Online Image Resizer
Resize, compress and convert images in seconds — right in your browser. Your files never leave your device. No account, no watermark, no limits.
- Private — no upload
- No signup
- Free & unlimited
ResizeMate resizes, compresses and crops images entirely in your browser — your files are never uploaded to a server. It is free, needs no signup, and adds no watermark.
Free image tools
Resize PNG
Resize PNG images online free. Set exact pixels or percentage, keep transparency, no quality loss. 100% in your browser — files never uploaded. No signup.
Resize JPG
Resize JPG / JPEG images online free. Exact pixels or percentage, adjustable quality, no signup. Runs in your browser — your photos are never uploaded.
Compress Image
Compress JPG, PNG and WebP images online free. Shrink file size with a live preview, no quality loss control, no signup. 100% in your browser — never uploaded.
Bulk Resizer
Resize many images at once for free. Apply one size to all, keep aspect ratio, download each instantly. Runs in your browser — no upload, no signup, no limit.
PNG to JPG
Convert PNG to JPG online free. Smaller files, optional resize and quality control, no signup. Runs in your browser — your images are never uploaded.
JPG to WebP
Convert JPG to WebP online free for smaller, faster images. Optional resize and quality control, no signup. Runs in your browser — never uploaded.
To 20 KB
Compress a JPG or PNG to 20KB online free. Hit strict 20 KB upload limits for forms and old systems — in your browser, no upload, no signup.
To 50 KB
Compress JPG or PNG to 50KB online free. Meet the common 50 KB limit on job and government application forms — in your browser, no signup.
To 100 KB
Compress JPG or PNG to 100KB online free. Ideal for fast-loading web images and upload limits — in your browser, no upload, no signup.
To 200 KB
Compress JPG or PNG to 200KB online free. Great for crisp blog and product images that still load fast — in your browser, no signup.
To 500 KB
Compress JPG or PNG to 500KB online free. Keep high quality for portfolios and large web images — in your browser, no upload, no signup.
To 1 MB
Compress a photo to under 1MB online free. Meet email and upload limits while keeping high quality — in your browser, no upload, no signup.
Crop
Crop images online free. Drag to select any area, or lock to 1:1, 16:9 or 4:3, then download. Runs in your browser — your photos are never uploaded.
WebP to JPG
Convert WebP to JPG online free. Open WebP images in software that will not accept them, with optional resize and quality control. Runs in your browser.
WebP to PNG
Convert WebP to PNG online free and keep full transparency. Lossless output for logos and graphics, no signup. Runs in your browser — never uploaded.
PNG to WebP
Convert PNG to WebP online free for much smaller files that keep transparency. Ideal for faster websites, no signup. Runs in your browser — never uploaded.
Passport Photo
Resize a photo to passport size online free. One-click presets for 35×45 mm, US 2×2 in and more, with a 50 KB target for upload forms. Never uploaded.
Social Sizes
Resize images for Instagram, YouTube, Facebook, X and LinkedIn with one-click presets. Free, no signup, runs in your browser — never uploaded.
HEIC to JPG
Convert iPhone HEIC photos to JPG online free. Works in any browser, no signup, no upload — your photos are decoded on your own device.
Image to PDF
Combine JPG, PNG or HEIC images into a single PDF online free. Multi-page, A4 or Letter, no signup, no upload — built in your browser.
Which image format should you use?
| Format | Best for | Transparency |
|---|---|---|
| PNG | Logos, graphics, screenshots, sharp edges | Yes |
| JPG | Photos — smallest size for rich images | No |
| WebP | Web use — smaller than both at similar quality | Yes |
Rule of thumb: photos → JPG or WebP; anything with transparency or text → PNG or WebP.
Resize by pixels or by percentage?
Use pixels when something else decides the size for you — an upload form that demands 600×600, a profile picture slot, a print template. Type the exact numbers and leave "lock ratio" on so the image is not stretched.
Use percentage when you simply need the file smaller and nothing depends on exact dimensions. Scaling a photo to 50% halves its width and height, which removes about three quarters of the pixels and usually shrinks the file by a similar margin.
If you enter a width and a height that do not match the original proportions, "lock ratio" recalculates the second number for you. Turn it off only when you genuinely want to distort the image.
How far can you shrink an image before it looks bad?
Scaling down is forgiving — you are discarding detail that was there, and the result stays sharp. Scaling up is not: enlarging cannot invent detail that was never captured, so a 400 px image stretched to 1600 px will look soft in any tool. That is what the "don't enlarge" checkbox prevents.
| Scale | Pixels remaining | Typical use |
|---|---|---|
| 100% | All | Original, compress only |
| 75% | ~56% | Light trim, no visible change |
| 50% | 25% | Web images, email attachments |
| 25% | ~6% | Thumbnails and avatars |
Percentages apply to width and height, so the pixel count falls by the square — halving the dimensions leaves a quarter of the pixels.
Why use ResizeMate
Private
Images are processed in your browser and never uploaded to a server.
Fast
No upload/download round-trip — results are instant on your device.
Free
No signup, no watermark, no limits.
Frequently asked questions
- Are my images uploaded to a server?
- No. Every tool on ResizeMate runs entirely in your browser using your device. Your images never leave your computer.
- Is ResizeMate free?
- Yes — all tools are free, unlimited, with no signup and no watermark.
- What formats are supported?
- PNG, JPG/JPEG and WebP for resizing and compression.