How to resize an image
- Drop one or more images onto the box.
- Choose how to resize:
- By pixels — enter a width and/or height. Leave one at 0 to keep the aspect ratio.
- By percentage — scale everything to, say, 50%.
- Presets — common social-media and document sizes.
- Pick the output format and quality, then click Resize. Download each image or all at once.
Batch resizing applies the same settings to every image — handy for product photos or a gallery.
Common sizes
| Use | Size (px) |
|---|---|
| Instagram post (square) | 1080 × 1080 |
| Instagram portrait | 1080 × 1350 |
| Instagram / TikTok story, Reel | 1080 × 1920 |
| YouTube thumbnail | 1280 × 720 |
| YouTube channel banner | 2560 × 1440 |
| Facebook cover | 820 × 312 |
| LinkedIn profile photo | 400 × 400 |
| X (Twitter) header | 1500 × 500 |
| Full HD wallpaper | 1920 × 1080 |
| 4K wallpaper | 3840 × 2160 |
| US passport photo | 600 × 600 (2 × 2 in at 300 dpi) |
| Email-friendly photo | 1200 px on the long side |
Pixels, inches and dpi
Screens deal in pixels; printers deal in inches at a dots-per-inch density. To print at good quality you want about 300 dpi, so a 4 × 6 inch print needs 1200 × 1800 pixels and an 8 × 10 needs 2400 × 3000. For screens, dpi is irrelevant — only the pixel dimensions matter.
How resampling works
Shrinking an image means combining many source pixels into each output pixel. Doing that in one step from a very large image can produce moiré or aliasing, so the tool scales down in halving steps and finishes with a high-quality filter. The result is noticeably crisper than a naive single-pass resize, especially for text and fine lines.
Tips
- Resize before compressing. Reducing pixels usually saves more than lowering quality, with no visible cost.
- Keep an original. Once downscaled, detail is gone; you can’t get it back.
- Use PNG for graphics and JPG/WebP for photos when choosing the output format.
- For a fixed-shape preset, crop to that shape in your phone’s editor first so nothing gets squashed.
Need a smaller file without changing dimensions? Use the image compressor. Want to change the format only? Use the image converter.
Frequently asked questions
Will resizing distort my image?
Not with "Keep aspect ratio" on — the other dimension is calculated for you. Presets with a fixed shape (like 1080×1080) stretch to fit; crop the image to that shape first if it isn't already.
Can I make an image bigger?
Yes, but enlarging can't add detail — a 500-pixel image scaled to 2000 pixels will look soft. Small enlargements (up to ~150%) are usually fine.
Does resizing reduce quality?
Downscaling with high-quality resampling looks sharp. The output quality slider only affects JPG and WebP compression; set it to 90+ for maximum fidelity.
Is my photo uploaded?
No. The resizing is done by your browser on your device. Nothing is sent anywhere.
Last updated August 26, 2026.