Resize image free, in your browser
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This image resize tool changes a photo's width and height, or knocks it down to a percentage of what it was. Proportions stay locked unless you unlock them, and it all happens in your browser.
By Sam Ridder · Last updated: October 2026
You get the real result, not a blurry preview. It runs in your browser, so nothing is uploaded, and the file you download is the full result.
On Windows, a Mac or a phone
This resizer works in any browser: drop a file in, set a width or a percentage, and download. Windows, a Mac, a Chromebook or a phone all get the same page, with nothing to install, and the resizer image preview updates as you type. Resizing is plain maths, not AI: shrinking loses nothing you will see, but enlarging past the original size only stretches pixels, so for that use the upscaler tool instead.
Pixels or percent, whichever you think in
Type an exact width if you have been given one: 1080 px for an Instagram post, 512 px for an app icon, 800 px for a blog image. Leave "keep the proportions" ticked and the height follows on its own, so the photo never comes out stretched. If you genuinely need a fixed width and height that do not match the original shape, untick it and accept the squash, or crop to the right shape first, which is what you almost always actually want.
If you are just trying to make a file lighter, think in percentages instead. Halving the width leaves a quarter of the pixels, which is a far bigger saving than any quality setting will give you. The same width-or-percent choice applies whether it's for the web or for print.
"Resize to 100 KB" means compress, not resize
Resizing an image "in KB" is worth untangling, because the two knobs do different jobs. Pixels are how big the picture is. Kilobytes are how heavy the file is. Making the pixels smaller does make the file lighter, but you cannot aim at a KB number by dragging a width around: you would be guessing and re-exporting all afternoon.
So if the requirement is a file size, use the compress page, which takes a KB target and works the settings out for you. Use this page when the requirement is a dimension. And when a form demands both, do it in that order: resize to the dimension here, then compress to the size there.
Sizes people actually get asked for
Most resizing is somebody else's rule, not a preference. These are the ones that come up over and over, and none of them need a photo editor: just a quick way to change image size to an exact number of pixels.
- Instagram post: 1080 px wide (1080 × 1350 for the tall 4:5 crop)
- Instagram story or a Reel cover: 1080 × 1920
- Passport and visa photos: 35 × 45 mm at 300 DPI works out at 413 × 531 px, if all you need is to resize image to passport size, though PassportNinja does the whole job including the background
- Profile pictures: square, and 512 × 512 is plenty for any site
- Email and forms: 1600 px on the long edge is sharp on any screen and still small
- Printing 10 × 15 cm: about 1200 × 1800 px at 300 DPI
Making a photo bigger is a different job. Stretching pixels up in a browser just makes them softer; rebuilding the missing detail needs a model, which is what the upscaler on this site is for.
Free, online, no account
Image resizer, photo resizer or picture resizer: whichever name you know it by, it is one tool. As an online image resizer it works straight from a phone browser, and as a free image resizer online it needs no account, adds no watermark and gives you the full-size file every time. You can resize image for free one photo after another with no daily cap, because the work happens in your browser, not on a server. A JPG resize, a PNG resize and a WebP resize all take the same width-or-percentage step.
Related: Enhance a Low-Resolution Photo: Free AI Upscaler, Full Size, Free photo colouriser.
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To resize photo online free, drop the file in, type a width and download; photo resize online works the same way on any device, and the image resize online step happens entirely in your browser. As an image resizer free of sign-up walls, or a free photo resizer for a stack of old snapshots, it keeps proportions and never uploads the file. If you resize picture online free, the browser does the maths locally; each free resize image run takes about a second, and image resize free of charge has no daily limit.
Big scans and modern phone photos shrink the same way as small ones, with no megapixel ceiling to hit first, since nothing uploads to a server. To change size of an image, type an exact width or a percentage and the height follows automatically. Resize images free online one file at a time, each keeping its own width; every format your browser shows (JPG, PNG, WEBP and AVIF) takes the same step. As a photo resizer free online it needs no account and no install, and online resize image work never waits in a queue.
Reduce image size here means pixel dimensions specifically, a different job from reducing file size in kilobytes, which is what the compressor page is for. As an image shrinker it removes real pixels rather than blurring them, so a photo shrunk down still looks sharp at its new size: shrink image files to an exact width or percentage, with the height following as long as proportions stay locked. This image shrink step never adds blur or padding. An online image resizer free of uploads, it runs on the browser's own canvas, which is also why nothing leaves your device.
JPEG, PNG and batches
To resize a jpeg photo or a JPG file, drop it in like any other format; there is nothing format-specific to configure. You can resize png image files in the same box, but the result is saved as a high-quality JPG, so transparency is lost. That matters if you resize PNG pictures with a transparent background, such as a PNG logo: whether you resize images PNG or JPG, the output is a JPG, and there is no option to convert to another format. If you resize picture PNG files often for their transparency, the crop and rotate tools keep the PNG format instead.
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To bulk resize photo files, drop them in one by one: each keeps its own width if you set them individually, and there is no bulk resize mode that does them all at once. Picture resize and online resize picture are the same browser-only step: drop a file in, set a width or percentage, download. You can resize images online one after another without an account, and resize image free online as often as you like, since nothing is metered.
The pixel fields are the core control: to resize image pixels, type a width or height and the other side follows if proportions are locked. To resize image without losing quality, shrink in one step: removing pixels displays and compresses cleanly, while shrinking, saving and shrinking again loses detail each time. That is what resize image without quality loss comes down to; enlarging is a different job, for the AI upscaler.
To resize image dimensions for print, convert the physical size to pixels first: 300 DPI at a given size tells you the numbers to type, since the fields take pixels, not centimetres. A 10 × 15 cm print is about 1200 × 1800 px. If a form also sets a KB limit, finish on the compress page.
The download is the export button above: no installer, just the finished file, the same on Windows as anywhere else.
Resizing by megabytes belongs on the compress page, since file size is a different question from dimensions; resizing by ratio is the percentage option here.
Shrinking is the direction this tool is built for. Going bigger works the same fields in reverse, with the caveat from above: past the original size, stretching goes soft, and the upscaler is the image enlarger to use when you want detail added rather than pixels stretched.
What this resize does not do
Developers who want CSS sizing usually need width, height or object-fit in their own stylesheet rather than a pre-resized file, but shrinking the source image here first still helps. The resizing itself happens on the HTML canvas built into your browser, the same technique the compress and crop pages use.
There is no option to add white space or expand the canvas: this only scales the pixels that already exist. For padding a photo onto a bigger canvas, an image editor with a canvas-size feature is the right tool. It never adds blur or a blur background either; it only changes pixel dimensions. If you need an image crop instead, trimming the frame rather than scaling it, The crop tool is next door, and cropping before resizing is often what a fixed shape needs.
Word, Excel and PowerPoint can resize a picture by dragging its corner handles, which is fine for a quick shrink inside a document, though it doesn't re-encode the file the way this page does. When you resize a picture for an upload, this page gives you a real, smaller file.
Enlarging, presets and platforms
It works the same whatever the photo came from (a camera roll, a download, a screenshot), and the aspect ratio stays locked by default. For print, pair the pixel numbers with the DPI rule above.
Enlarging runs into the limit described above: real enlargement needs the upscaler, not a stretch, and so does any image enhance step that should add detail. To resize the image to exact pixels, type the numbers rather than dragging a slider.
For specific platforms, type the numbers straight in: a YouTube banner takes 2560 × 1440 pixels for the channel art, and an Instagram Story 1080 × 1920, as listed above. To resize image for facebook, see the cover size in the questions below. The new file size shows once you press resize, so you can see the trade-off before you download this picture.
Need the file itself smaller, not just the image, because it's actually a PDF? ScanReviver's compress PDF shows the size before and after at three strengths, and says so if it's already tight instead of "compressing" it bigger. You resize online free of charge, with the work happening in your own browser rather than on a server.
How to resize photos and pictures
To resize a photo, drop it in the box above, type a new width or height, or press one of the shortcut buttons (75%, 50%, 25%, or 1080, 800 and 512 px wide), then press the resize button. The same box works when you want to resize pictures from a phone, a camera or a screenshot, and the result line shows the new size in pixels and in KB next to the original before you download.
Want to resize photos for more than one use, say a blog and an email? Start each time from the original file instead of shrinking a copy you already shrank, because every JPG save costs a little detail. The width and height fields accept any whole number from 1 to 20000 pixels, and the download is a JPG saved at high quality.
Common questions
How do I resize an image without losing quality?
Making a photo smaller is nearly lossless if you do it once, in one step, at high quality: which is what this tool does. Quality gets lost when you shrink, save, shrink again, or when you enlarge a photo beyond its real detail.
How do I resize an image to a number of KB?
That is compressing rather than resizing. Use the compress page, give it your KB target, and it finds the settings for you.
Does it keep the aspect ratio?
Yes, by default. Type a width and the height follows. Untick "keep the proportions" if you deliberately want to stretch it.
Can I resize a photo to an exact pixel size and a KB limit at the same time, like for a form?
Not in one step. Set the exact width and height here first, then take that result to the compress page and dial in the KB target: that two-step order is what a passport, visa or form upload with both a pixel and a file-size limit needs.
Can I make a small photo bigger?
You can set a larger width here, but browser scaling only stretches the pixels you already have. To genuinely add detail, use the AI upscaler, which rebuilds it.
Is my photo uploaded?
No. The resizing happens in your browser with the canvas API, so the file never leaves your device.
What file types can I use?
Anything your browser can display: JPG, PNG, WEBP, GIF and BMP. HEIC from an iPhone usually needs saving as JPG first, because most browsers cannot decode it.
How to resize an image, step by step?
Upload the photo, type the width or height you need (the other side follows automatically), and download: that's the whole process, no software to install.
How do I resize an image for Instagram?
Type 1080 in the width field for a feed post, or set 1080 × 1920 for a Story. Proportions stay locked so the photo won't stretch, and it all runs in your browser, nothing uploaded.
How do I resize a JPG online?
Drop your JPG into PicReviver's resizer, set a width or pick a percentage, and download. The file is never uploaded since everything runs in your browser.
Can I resize an image without Photoshop or Word?
Yes. PicReviver's resizer runs entirely in your browser: no software to install, no account, no upload needed.
Is there a picture resizer free to use, with no hidden catch?
Yes: this picture resizer has no account wall, no watermark, and gives you the real full-size file to download, not a locked preview.
How do I resize an image for printing?
Match the pixels to the print size at 300 DPI: about 1200 × 1800 px for a 10 × 15 cm print, scaling up from there. To resize image for printing at a professional lab, use the same maths, but check their upload page first: some labs want a DPI tag embedded in the file, which this tool doesn't add.
Does resizing for Instagram crop the photo?
No: resize image for instagram without cropping is exactly what happens by default: only pixel dimensions change, nothing gets cut off. If the ratio doesn't match what you need, use crop first, then resize.
Can I resize an image to 20 KB, or does it need AI?
20 KB is a compress job, not a resize: see the compress page for that. There is no AI in this tool; it is plain browser scaling. For AI-rebuilt detail when enlarging, use the upscaler.
What size should I resize an image for a Facebook cover?
Resize image to facebook cover size by typing 851 in the width field here: a Facebook cover photo displays at 851 × 315 px on desktop. Untick "keep the proportions" if your original isn't already close to that ratio.
Can I change an image's pixel size online for free?
Yes: type a width (or pick a percentage) and press resize. That is all it takes to change image pixel size, online and free. If you need a KB number instead of pixels, use the compress page.
Can I resize a PNG and keep it a PNG, or convert the format?
No. The result is saved as a high-quality JPG, so transparency is lost, and there is no option to convert to another format. If you resize PNG files for their transparency, the crop and rotate tools keep the PNG format instead.
Does AI resize image files better than a normal resize?
For shrinking, no: removing pixels loses nothing you will see, and it is plain maths. An AI model only earns its place when you enlarge, and for that the upscaler page rebuilds the missing detail instead of stretching pixels.
Can I resize an image without quality loss?
Yes: resize image without quality loss is what happens when you shrink in one step, at high quality, which is what this tool does. Quality only suffers if you shrink, save, then shrink again, or if you try to enlarge past the real detail: for that, use the AI upscaler instead.