Resize Image
Change width and height precisely, by pixels or percentage.
How to resize image online
- Upload your image — Drag & drop a JPG, PNG, WEBP, GIF or BMP file, or click Upload Image.
- Set new dimensions — Enter the exact width and height in pixels, or resize by percentage.
- Lock the aspect ratio — Keep the ratio locked so your image doesn't look stretched or squashed.
- Download the result — Click Go to Download to save the resized image — no watermark, no signup.
Why resize images with ToolsGuru?
- 100% private — Your image is resized locally in your browser. Nothing is ever uploaded to a server.
- No quality surprises — Preview the resized image before downloading, exactly at the size you set.
- Works on any device — No install, no app — just open the page on desktop or mobile.
- Free, no limits — No watermark, no sign-up, no daily usage cap.
Resize image to a specific size
Tap a quick-size button above, or set exact pixels/percentage manually. Common targets:
- Resize image to 1080x1080 — square format for Instagram and Facebook posts.
- Resize image to 1080x1920 — full-screen size for Instagram/Facebook Stories and Reels covers.
- Resize image to 1280x720 — standard YouTube thumbnail dimensions.
- Resize image to 820x312 — Facebook cover photo size.
- Resize image for passport photo — 413x531 px (35x45mm at 300 DPI), a common government-form requirement.
- Resize image to 50% or any custom percentage — shrink dimensions proportionally without typing exact pixels.
Frequently asked questions
Does resizing an image reduce its quality?
Making an image smaller usually keeps it sharp. Making it much larger than the original can make it look soft or blurry, since new pixels have to be estimated.
What's the difference between resize and crop?
Resizing changes the overall dimensions of the whole image. Cropping cuts away part of the image and keeps the rest at its original detail. Use our Crop Image tool if you want to cut instead of scale.
Can I resize by percentage instead of pixels?
Yes — you can switch between exact pixel dimensions and a percentage of the original size.
Is my image uploaded to your server?
No. All resizing happens locally in your browser using JavaScript. Your file never leaves your device.
What size should I resize a photo for a passport application?
A common passport photo size is 413x531 pixels (35x45mm at 300 DPI) — use the "Passport Photo" quick button above, then check your specific country's exact requirement.
What image size is best for Instagram or YouTube?
Instagram posts look best at 1080x1080 pixels, Stories at 1080x1920, and YouTube thumbnails at 1280x720 — all available as quick-size buttons above.