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Change image dimensions to an exact size or by percentage, with presets for Instagram, passport photos, HD and more. Keep the aspect ratio, top quality, 100% in your browser.
About Resize Image
Confileo's Resize Image tool changes an image to exact pixel dimensions or a percentage while keeping it sharp. Everything runs in your browser, free and without signup, and your files are deleted automatically after processing.
Resizing and compressing are two different jobs that get confused constantly. Resizing changes how many pixels an image contains — a 4000 × 3000 photo becomes 1200 × 900. Compressing keeps the pixel count and throws away colour detail instead. If a site rejects your upload for being too large in dimensions, compression will not help; you need to resize. If it rejects the file size in megabytes, resizing usually fixes that too, because fewer pixels means a smaller file.
Confileo's Image Resize tool changes an image to exact pixel dimensions or by percentage, straight in the browser. Aspect ratio stays locked by default so nothing stretches, and you can unlock it when a platform demands a shape the original does not have. JPG, PNG and WebP are all supported, and PNG transparency survives the resize.
The dimensions worth knowing: 1200 × 630 for a link preview on Facebook, LinkedIn or X; 1080 × 1080 for a square Instagram post and 1080 × 1350 for the vertical one; 1280 × 720 for a YouTube thumbnail; 400 × 400 is plenty for a profile photo on almost any site. For an image inside a web page, 1600 pixels wide is generally the point past which visitors see no improvement and only pay in load time.
Making an image smaller is lossless in the sense that matters — you are discarding pixels you no longer need, and the result stays sharp. Making one larger is a different story: the extra pixels have to be invented, so an upscaled image looks soft no matter which tool does it. If you need a large final image, always start from the largest original you have rather than enlarging a small one.
Everything runs from the browser on phone and desktop alike, with no install, no account and no watermark on the result. Your file is processed and then deleted, and the original on your device is never modified — so you can try several sizes and keep whichever one the upload form finally accepts.
Quick facts
- Price
- Free to start — 3 credits per file (50 credits as a guest, 600 a month with a free account)
- Signup
- Not required
- Max file size
- Up to 100 MB per file
- Your files
- Deleted automatically after processing
- Works on
- Any browser — desktop, tablet, mobile
- Watermark
- None on your output
How to use Resize Image
- Upload your image.
- Enter the new width and height, pick a percentage, or choose a preset.
- Download the resized image at top quality.
Why use Confileo
- ✓Free to start — 50 credits with no account, 600 a month with a free one; no watermarks and no credit card.
- ✓No signup or account required — start using it instantly.
- ✓Your files are processed securely and deleted automatically for full privacy.
- ✓Works in any browser on desktop, tablet and mobile — nothing to install.
- ✓Fast processing built to handle real, everyday document workloads.
Resize Image — Frequently asked questions
What is the difference between resize and crop?
Resizing scales the whole image to new dimensions and keeps all of it; cropping cuts away part of the image. Use resize to fit an exact size, crop to remove edges.
How do I resize an image to an exact size like 1080x1080?
Switch to Pixels, type the width and height (e.g. 1080 x 1080) and download — or just pick the Instagram Post preset.
Will resizing keep the aspect ratio so my image is not stretched?
Yes. Keep the lock enabled and the height adjusts automatically with the width, so the image never looks squashed.
Can I enlarge a small image without it looking too blurry?
Yes. Set a larger width or percentage; high-quality smoothing keeps upscaled images as clean as possible.
Does resizing reduce quality?
Downscaling is done in steps for crisp results and you control the output quality. The original file is never changed — you download a new copy.
Is my image uploaded to a server?
No. Resizing happens entirely in your browser, so the image never leaves your device — private and instant.
How do I change the size of an image online?
Upload the image, enter the width and height you need in pixels, and download the resized copy. It is free, needs no account, and nothing is installed.
What is the difference between resizing and compressing?
Resizing changes the pixel dimensions — a 4000×3000 photo becomes 800×600. Compressing keeps the dimensions and reduces the file size instead. If a form rejects your image for being too large, check whether it means dimensions or file size, because the fix is different.
How do I resize without stretching the image?
Keep the aspect ratio locked so height follows width automatically. Entering both numbers freely at a different ratio is exactly what squashes faces and distorts logos.
Can I enlarge a small image?
You can, but detail that was never captured cannot be invented — enlarging past roughly double the original size starts to look soft. Shrinking is always safe; enlarging is a compromise.
What dimensions do I need for common uploads?
Passport and ID photo forms usually ask for a fixed pixel size stated in the instructions. Profile pictures are typically 400×400, and web banners around 1200×630. Enter the exact numbers rather than guessing.
Does resizing reduce the file size too?
Almost always, and often dramatically: fewer pixels means less data. Halving both width and height cuts the pixel count to a quarter, which is frequently enough to get under an upload limit on its own.
Which image formats are supported?
JPG, JPEG, PNG and WebP. The output keeps the original format, so a PNG stays a PNG with its transparency intact.
Is the image quality affected?
Shrinking an image keeps it looking sharp — it is the standard way photos are prepared for the web. Quality only suffers when you enlarge well beyond the original dimensions.
Is this tool really free?
Yes. You get 50 credits without an account and 600 credits a month with a free account; most tools use 3 credits per file and advanced ones 12. No watermark, no credit card. Pro raises that to 200,000 credits a month.
Do I need to create an account?
No. You can use the tool straight away without signing up or logging in.
Are my files safe and private?
Yes. Your files are processed for the task you requested and then deleted automatically — they are never shared or kept.
Does it work on my phone?
Yes. The tool runs in any modern browser, so it works the same on desktop, tablet and mobile with nothing to install.