Image Resizer (Exact Pixels or Percent)
Resize a picture to exact pixel dimensions or a percentage, keeping it sharp and in proportion.
Free forever, no sign-up and no limits, and this tool installs on its own so you can keep it on your home screen.
Resize a picture to exact pixels or a percentage in seconds, or do up to 50 at once. Proportions stay locked unless you unlock them, upscaling gets an honest warning, and every file downloads with its new size in the name.
How to use it
- Choose a picture, or fiftyTap the box or drop a whole folder in. One picture loads its dimensions into the fields; a batch shows a running count as it works through.
- Set the sizeType a width or height (the other side follows), tap 50% or 25%, or tap a common size like 1920×1080. For a batch, a percentage is the default because it suits pictures of different shapes.
- DownloadFiles save as name-1600x1200.jpg style, so versions never overwrite each other. A batch saves as a single ZIP, or one row at a time.
Pixels are the size that matters
Every practical image-size problem is really a pixel problem. The form that wants "under 2 MB" is asking for fewer pixels; the profile photo that looks blurry was enlarged from too few. Megabytes are the symptom, dimensions are the cause.
The useful working numbers: 1600 px covers a full-width web image, 1080 px covers Instagram, 800 px covers a document illustration. Print wants roughly 300 pixels per inch, so a 10×15 cm print uses about 1200×1800.
Locked proportions, and when to break them
A picture's width-to-height ratio is part of the picture; change one without the other and everything in it stretches. That is why the lock is on by default and follows your typing either way. Unlock it when a format dictates both numbers, a 1200×630 link preview or a square avatar. Even then, cropping usually beats distorting.
Downscaling is free, upscaling is not
Shrinking a picture keeps it sharp: high-quality resampling averages the extra detail away cleanly. Enlarging is a different deal, because the pixels that would carry the new detail were never captured, so software can only smooth between the ones that exist. This tool warns rather than refuses, but no resizer anywhere can add what the camera did not record.
No account, no watermark, and every file downloads with its dimensions in the name so nothing gets overwritten.
Questions people ask
How do I resize without stretching or squashing?
Leave Keep proportions on, it is on by default. Change either side and the other follows the original ratio, so faces stay faces. Unlock it only when a format genuinely needs both dimensions, like a 1200×630 social card, and accept that the picture will distort.
What size should a picture be for a website?
Match the largest size it will be displayed at. Full-width hero images: 1600–2000 px wide. Content images: 800–1200 px. Thumbnails: 300–400 px. Beyond that is bytes spent on detail no one sees.
Can I make a small picture bigger?
You can, and the tool will, with a warning. Enlarging cannot invent detail that was never captured, so the result is a softer version of the original. A modest bump is fine; a 200-pixel logo blown up to poster size will disappoint whatever tool does it.
Does resizing keep transparency?
Yes. PNG in, PNG out, transparency intact. WebP likewise, and JPGs stay JPG. The format never changes behind your back; for a different one, run the result through the converter.
Why does the file get so much smaller when I resize down?
File size follows pixel count. Halving both dimensions leaves a quarter of the pixels, so roughly a quarter of the bytes. That makes resizing the most effective way to shrink a photo, more so than any quality slider.
Does the resized copy contain my location?
No. The saved copy leaves camera data behind: the location, device model and date stamps a phone tucks into a photo stay in your original and do not travel with the resized file. The pixels are all that gets saved.
Can I resize a whole folder at once?
Yes, up to 50. A percentage is the default for a batch because it treats each picture on its own terms, so a portrait stays a portrait. Choose exact pixels with Keep proportions on and each picture is scaled to fit inside that box, whichever side runs out of room first: nothing is stretched, but the sizes will differ. Turn Keep proportions off and all are forced to the same rectangle, stretching any shaped differently. They run one at a time, with a count showing how far along the batch is.
What size should a photo be to email it?
Aim for a long edge of about 1600 pixels. That still looks sharp on any screen the recipient is likely to open it on, and it cuts a 12-megapixel phone photo down enormously, which is usually the difference between an attachment that sends and one that bounces.