Resize Image
Change image dimensions in your browser. Resize up to 50 files at once by pixels, by percentage, or with a preset for the size you actually need.
Presets that know the size
Passport photo, Instagram, YouTube thumbnail and more — you pick the use, not the numbers.
Up to 50 at once
Drop a folder in and get everything back as a single ZIP.
Nothing is uploaded
Your photos stay on your device, along with the location data inside them.
No accidental stretching
The aspect ratio is locked by default, and you choose how odd ratios are handled.
In short: To resize an image is to change how many pixels it has. You can give exact numbers, a percentage, or pick a preset such as a passport photo or an Instagram post. Everything runs in your browser, so the files never leave your device.
Why You End Up Needing to Resize an Image
Almost nobody resizes a photo for fun. There is a box somewhere that wants a specific number of pixels, and the file you have does not match it.
The three situations below cover nearly every reason people look for an image resizer.
A form with a fixed requirement
Passport and visa applications, exam registrations and ID uploads specify exact dimensions, and reject anything else. These are the cases where guessing wastes the most time.
A platform that will crop you badly
Upload a 4:3 photo as an Instagram post and the sides get cut. Upload the wrong ratio as a YouTube thumbnail and your text ends up outside the frame. Sizing it correctly first means you decide what stays in.
A file that is simply too heavy
Pixel count drives file size more than anything else. A 4000 px photo shown at 800 px is carrying twenty-five times the data it needs, and shrinking it is the cheapest saving available.
How to Resize an Image in 3 Steps
You can resize an image here in a few seconds, and every step runs on your own machine. Nothing is uploaded and your originals are never modified.
- 1
Add your images
Drop in up to 50 files — JPEG, PNG, WebP, GIF, BMP or AVIF. The dimensions of the first one are filled in for you, so you can see what you are starting from.
- 2
Say what size you want
Type exact pixels, drag a percentage, or pick a preset. With the ratio locked, changing one side updates the other automatically.
- 3
Check the sizes and download
Each file shows its old and new dimensions. Take them individually, or all at once as a ZIP.
Pro tip — If your images have different shapes, a preset will not fit them all perfectly. Choose crop to fill the frame, or letterbox to keep everything visible with padding around it.
Note — Making an image smaller is safe. Making it bigger is not — there is no extra detail to invent, so an enlarged photo just looks soft. That is why enlargement is switched off by default.
Sizes You Do Not Have to Look Up
Most image resizers hand you two empty boxes and expect you to already know the answer. But the question people actually have is "how big should a passport photo be", not "what is 413 by 531".
So the common sizes are built in, grouped by what you are doing.
ID and profile photos
Passport photos at 413×531 (35×45 mm at 300 dpi), one-inch and two-inch ID photos, and a square 512×512 for profile pictures.
Social platforms
Instagram square, portrait and story, YouTube thumbnails at 1280×720, link previews at 1200×630, and header banners for LinkedIn and X.
Screens
Full HD, HD and 800×600 for the times you just need something to fit a normal display.
What Happens When the Shape Does Not Match
A preset has a fixed shape. Your photo probably has a different one. Something has to give, and you should be the one deciding what.
Crop to fill
The image fills the whole frame and the overflowing edges are cut off. Nothing is distorted and there are no borders. This is the default, and the right answer most of the time.
Fit inside with padding
The whole image stays visible and the leftover space is filled with a background colour. Use it when cropping would cut off something that matters.
Stretch to fit
The image is squashed or pulled to match the frame exactly. It distorts faces and circles, so it is almost never what you want — but it is there when you need it.
Keeping Quality While You Resize
Reducing dimensions throws away pixels, and how those pixels are thrown away decides whether the result looks clean or mushy.
Shrinking is nearly free
When you go smaller, there is more information than the new size needs, so the result stays sharp. High-quality smoothing is used, which matters most on text and thin lines.
Enlarging cannot add detail
Going bigger has to invent pixels that were never captured. The result is softer than the original, always. If you truly need a larger image, go back to the source file rather than enlarging a small copy.
DPI is not what makes a photo bigger
A common confusion: forms ask for "300 dpi" and people go looking for a DPI setting. DPI only describes how large an image prints — on screen it means nothing at all.
What actually matters is the pixel count. A 35×45 mm photo at 300 dpi is simply 413×531 pixels, which is why that preset exists. Get the pixels right and the dpi takes care of itself.
The format still matters
Photos belong in JPEG or WebP. Screenshots, logos and anything with transparency belong in PNG. Resizing does not change that, and picking the wrong one can undo the size saving you just made.
Resizing a Whole Folder at Once
One image is easy anywhere. The friction shows up at thirty — event photos, product shots, a set of scans that all need to fit the same box.
Every file here gets the same settings and comes back in one ZIP, with its old and new dimensions listed so you can spot anything that came out wrong.
When the batch has mixed shapes
Portrait and landscape photos cannot both fill a square frame untouched. Crop to fill handles this sensibly; if the set matters more than the framing, use padding and everything stays whole.
One bad file does not stop the rest
If an image is corrupt or in a format the browser cannot decode, it is marked as failed and skipped. The other forty-nine still finish.
Photos carry more than pixels
A photo from a phone usually holds EXIF metadata: camera model, exact timestamp, and very often the GPS coordinates of where it was taken. That travels with the file when you send it somewhere.
Because the image is decoded and drawn fresh in your browser, that metadata does not carry into the result. The orientation flag is applied to the pixels first, so photos shot in portrait stay upright rather than falling on their side. And nothing is uploaded, so the original never sits on someone else’s server.
Browser-Based vs Upload-Based Resizers
Most online image resizers send your files to a server first. Doing it locally changes several things.
| Aspect | This tool (in browser) | Upload-based resizers |
|---|---|---|
| Where your files go | Never leave your device | Uploaded, then deleted after hours |
| Batch size | Up to 50, free | Often limited, or paid |
| Size presets | Built in | Rarely offered |
| Works offline | Yes, after the first load | No |
| Account required | No | Often, past a quota |
| Speed on huge batches | Bounded by your CPU | Faster — their servers |
The last row is the honest cost: a server farm will chew through hundreds of large files faster than a laptop. For a folder of photos, the difference is seconds — and the files stay yours.
Complete PDF Tool Suite
Discover our comprehensive collection of PDF tools designed to handle all your document needs
PNG to PDF
Bind PNG images into a single, print-ready PDF
JPG to PDF
Convert JPG images to PDF format
Merge PDF
Combine multiple PDF files into one
Compress PDF
Reduce PDF file size efficiently
PDF to PNG
Convert PDF pages to PNG images
PDF to JPG
Convert PDF pages to JPG images
PDF to Text
Extract text content from PDF files
Split PDF
Split PDF into separate pages
Edit PDF
Edit and annotate PDF documents
Organize PDF
Organize and rearrange PDF pages
Rotate PDF
Rotate PDF pages and save permanently
Page Numbers
Add page numbers to PDF with live preview
Watermark PDF
Add a text watermark to PDF with live preview
HEIC to JPG
Convert iPhone HEIC photos to JPG
Delete PDF Pages
Remove unwanted pages and download a clean PDF
Extract PDF Pages
Save selected pages as a new PDF or separate files
Sign PDF
Draw, type, or upload a signature and place it on any page
Resize PDF
Change page size to A4, Letter, or custom dimensions
Crop PDF
Trim margins, drag-select, or auto-crop white space
Flatten PDF
Make forms read-only — keep text searchable or lock to image
PDF Metadata
View, edit, or strip author, title, dates and other metadata
Grayscale PDF
Convert to grayscale or black & white to save colour ink
Extract Images from PDF
Pull embedded photos out of a PDF and save as PNG or JPG
WebP to PDF
Convert WebP images to a PDF, merge many into one file
Protect PDF
Add an open password to your PDF, entirely in your browser
Unlock PDF
Remove a known password or restrictions from a PDF, in your browser
HEIC to PDF
Convert iPhone HEIC photos to PDF
AVIF to PDF
Convert AVIF images to PDF
TIFF to PDF
Convert TIFF images and scans to PDF
BMP to PDF
Convert BMP bitmap images to PDF
OCR PDF
Make a scanned PDF searchable, entirely in your browser
Redact PDF
Permanently remove sensitive text from a PDF, in your browser
Compress Image
Shrink JPEG, PNG and WebP in batch, entirely in your browser
Resize Image
Change image dimensions in batch, with presets, in your browser
Frequently Asked Questions
What people ask before resizing a batch of images.
How do I resize an image without losing quality?
Make it smaller rather than larger, and keep the aspect ratio locked. Shrinking discards pixels you no longer need, so the result stays sharp. Enlarging has to invent detail that was never there, which always looks softer. If quality matters, start from the largest original you have.
What size should a passport photo be?
Commonly 35×45 mm, which is 413×531 pixels at 300 dpi. That preset is built in, so you do not have to do the conversion. Requirements vary by country and by document, so check the specific authority before submitting — the size is only one of their rules.
How do I resize an image to an exact pixel size?
Choose pixels, type the width and height, and unlock the ratio if they do not match your photo. With the ratio locked, the second field follows the first so nothing gets distorted. If you need exact numbers that do not match your image shape, pick crop to fill or padding to control how the difference is handled.
Can I resize several images at once?
Yes, up to 50 per batch, and it is free. The same settings are applied to every file, and the results come back as one ZIP. The limit exists to protect your device’s memory rather than to sell an upgrade.
Do my images get uploaded?
No. They are resized inside your browser. You can verify it by disconnecting from the network once the page has loaded — resizing still works. It also means the EXIF data in your photos, including GPS coordinates, never goes anywhere.
Why is my photo cropped after using a preset?
Because your photo and the preset have different shapes. Crop to fill covers the whole frame and cuts the overflowing edges, which is usually what people want. Switch to padding if you would rather keep the entire image visible with a border around it.
Will resizing make my file smaller too?
Usually a lot smaller, because pixel count drives file size. Halving both dimensions removes about three quarters of the pixels. If you need to hit a specific file size rather than a specific dimension, our image compressor takes a target in KB.
Which formats can I resize?
JPEG, PNG, WebP, GIF, BMP and AVIF. You can keep the original format or convert while resizing. Note that JPEG has no transparency, so a transparent PNG converted to JPEG gets a white background.
Related Tools
Other things you might want to do with the same images.
- Compress Image — hit a target file size in KB rather than a pixel dimension.
- JPG to PDF — turn the resized photos into a single PDF.
- PNG to PDF — do the same with PNG files.
- WebP to PDF — build a PDF straight from WebP files.
- HEIC to JPG — convert iPhone photos first, then resize them here.
Resize a batch without uploading it
Drop in up to 50 images and resize them right here in your browser.
Open the image resizer