Free online image resizer
Choose an image, set exact pixel dimensions and download a JPG, PNG or WebP file.
Quick answer
To resize an image, choose a JPG, PNG or WebP file, set the desired width and height, select Fit (padding), Fill (center crop) or Stretch, and download. Pictrelle uses your browser's canvas to resize the file locally; the source image is not uploaded to a Pictrelle server.
Make it precise.
All three tools are available below. This page opens with the matching tool selected.
Aspect ratio calculator
Turn width and height into a clean, simplified ratio.
Landscape format · 1.7778:1
Change either number and the ratio updates automatically.
Add an image to activate the download.
The quality slider affects JPEG and WebP; PNG export is lossless. Padding uses the chosen background color.
Check your image's maximum print size at a chosen resolution.
Based on image pixel dimensions; actual print results vary by printer, viewing distance and image quality.
Tip: 300 PPI is a common target for sharp close-viewed prints, not a universal requirement.
How to resize JPG, PNG and WebP images
- Drop an image into the tool or select a file (up to 40 MB).
- Enter width and height in pixels or use a quick export preset.
- Keep “Lock aspect ratio” selected to avoid accidental stretching, or choose a fit mode.
- Select PNG, JPEG or WebP and download the output.
What is the difference between Fit, Fill and Stretch?
| Mode | Effect on your image |
|---|---|
| Fit (padding) | Keeps the whole image visible, potentially adding borders |
| Fill (center crop) | Fills the requested frame and trims image edges |
| Stretch | Forces independent width and height, which can distort subjects |
Common image export sizes
Try 1080 × 1080 for a square, 1080 × 1350 for a 4:5 portrait, 1080 × 1920 for 9:16 vertical, or 1280 × 720 for 16:9 landscape. Image requirements may vary by publishing platform.
Questions about resizing photos
Can I resize without distorting the picture?
Yes. Use Lock aspect ratio when editing dimensions. For a specific frame size, select Fit to keep everything or Fill to crop the edges.
Does making an image larger increase quality?
No. Upscaling creates more pixels through interpolation but cannot recreate missing source detail.
Are my images uploaded anywhere?
No. This site's resizer performs decoding, drawing and export locally using the browser's image and canvas APIs.
Why does a very large image fail to export?
Browser memory and canvas limits vary. This tool caps output at 35 megapixels for reliability; try lower dimensions if it fails.