Picture Resizer
Resize a picture by pixels, percentage, or a max dimension — aspect ratio locked, formats your choice, entirely in your browser.
Best for casual pictures. Example: shrink a phone snap to an email-friendly size.
Before you use: very large batches are handled one image at a time here.Best for: quick everyday picture resizing. Not ideal for: precise print dimensions.
- Drop a picture from your phone.
- Choose a smaller, share-friendly size.
- Download the resized picture.
Picture Resizer is a browser-based image tool on ImgToolsBase. Resize a picture by pixels, percentage, or a max dimension — aspect ratio locked, formats your choice, entirely in your browser. To use it, upload or drop your image and view the result directly in your browser — no signup and nothing to install.
How this tool works
Pick a resize mode
Picture Resizer supports exact width/height, max width, max height, percentage, and longest/shortest side. Max and percentage modes keep the aspect ratio automatically.
Aspect lock is two-way
With the lock on, editing either dimension recalculates the other so the picture is never distorted. Turn it off for independent width and height.
Format and quality
Keep the input format or convert to JPG, PNG, or WebP. Quality applies to JPG and WebP only; PNG ignores it. JPG fills transparency with the background color.
Check the result panel
After processing, the panel shows the original dimensions, the final dimensions, the output format, and the new file size. Re-encoding removes EXIF metadata.
Picture Resizer in your browser
Picture Resizer changes the pixel dimensions of a picture right in your browser. Pick exact width and height, a maximum width or height, a percentage, or a longest/shortest side, and the tool keeps the aspect ratio unless you turn the lock off.
Output can stay the same format as the input or convert to JPG, PNG, or WebP. The quality slider applies to JPG and WebP; PNG export ignores it in most browsers. When you choose JPG, any transparency is filled with the background color you pick, because JPG cannot store transparency.
Turn on “do not upscale” to make sure a small picture is never enlarged past its original size, and check the result panel for the original and final dimensions and the new file size.
How to use Picture Resizer
- Upload your picture — click the upload area, press Enter, or drag the file onto it.
- Choose a resize mode in Picture Resizer, then set the width, height, or percentage. With the aspect lock on, editing one dimension updates the other.
- In Picture Resizer, pick the output format — and the quality for JPG or WebP — plus a background color when you output JPG.
- Click Process, check the original and final dimensions in the result panel, and download the resized picture.
Why use this tool
Picture Resizer offers exact, max width, max height, percentage, and longest/shortest-side modes instead of a single fixed box.
Editing the width updates the height and editing the height updates the width, so the picture never distorts.
Keep the original format or convert to JPG, PNG, or WebP, with an honest note that PNG ignores the quality slider.
Your picture is processed in your browser with the HTML canvas and is never uploaded to a server.
Common uses for Picture Resizer
Resize a picture to the exact pixels or maximum dimension a site or form allows.
Scale a big camera or phone picture down by percentage without enlarging it.
Set a max width so a picture loads quickly while keeping its proportions.
Resize a picture from a phone, tablet, or laptop browser with the file staying on the device.
When to choose Picture Resizer
This tool is for quickly setting a picture to a needed width or height without installing any software.
Worked example: A product picture must be exactly 500×500 for a marketplace listing. Set both values, export, and it meets the listing requirement in one step.
Picture Resizer is the same dimension tool as Image Resizer, handy when a site or form demands a precise picture size.
- Read the exact size a site requires before resizing so you only export once.
- Square crops sometimes need the image trimmed first if the source is rectangular.
Can I make a picture an exact square?
You can set equal width and height; if the source is rectangular, expect some content to fall outside unless you crop first.
Is there a size limit?
The practical limit is your device's memory, since the picture is processed locally in the browser rather than uploaded.
Frequently asked questions
Are my files uploaded to a server by Picture Resizer?
No. Picture Resizer runs entirely in your browser using the HTML canvas. Your picture is resized on your own device and is never sent to imgtoolsbase or any server.
Does Picture Resizer keep the aspect ratio?
Yes — by default Picture Resizer uses a two-way aspect lock: editing the width updates the height and editing the height updates the width. Turn the lock off to set width and height independently, which can stretch the result.
Which output formats does Picture Resizer support?
Picture Resizer can keep the same format as the input or convert to JPG, PNG, or WebP. The quality slider applies to JPG and WebP; PNG export ignores quality in most browsers.
Will Picture Resizer enlarge a small picture?
Only if you ask it to. Picture Resizer enlarges past the original size only when you allow it, and because that softens the image you can turn on “do not upscale” to cap the result at the original size.
When Picture Resizer saves JPG, what happens to transparency?
JPG cannot store transparency, so Picture Resizer fills transparent areas with the background color you choose. Use PNG or WebP if you need to keep a transparent background.
Related image tools
Tools that pair well with Picture Resizer.