Browser tool
Image Resizer
Set width and height for wallpapers, thumbnails, or social posts. Export as JPEG without uploading to a server.
Images are processed locally in your browser.
Pick dimensions that match the destination
Resizing to the exact pixels your platform expects avoids blurry upscales and huge downloads. Phone wallpapers are tall portraits; desktop backgrounds are wide landscapes; social thumbnails are often square or 4:5.
Common targets: 1080×1920 for stories and snaps, 1080×1350 for Instagram feed portraits, 1920×1080 for YouTube or desktop wallpapers, and 1200×630 for link previews.
Preserve quality while changing size
Always resize down from a larger original when you can. Upscaling a small image cannot invent detail — it only stretches pixels. If you need a larger wallpaper, generate or shoot at a higher resolution instead of forcing a tiny file up.
This tool stretches to the width and height you enter. If you must keep aspect ratio, crop in another editor first, or choose dimensions that match the original ratio.
- Export once at the final size — avoid repeated open/save cycles
- Use JPEG for photos; keep PNG for graphics with sharp text when possible
- Test the result on a real phone lock screen before sharing widely
Frequently asked questions
- Is there a maximum size?
- Exports are capped at 4096 pixels per side to keep the tool fast in the browser.
- Will aspect ratio change?
- Yes — the image stretches to your exact width and height. Crop in an editor first if you need to preserve ratio.
- Is this good for wallpapers?
- Yes. Try 1080×1920 for phones or 1920×1080 for desktop backgrounds. For iPhone Pro Max sizes, see our wallpaper size guides on the blog.
- Does resizing upload my file?
- No. Resizing happens locally in your browser.
- Can I upscale a tiny image?
- You can set larger dimensions, but the result will look soft. Start from a higher-resolution source when quality matters.
More utilities: Image Compressor, Color Palette Generator, QR Code Generator · Creator guides