Resize images
Set a width or height and the aspect ratio is preserved. Fit-to-box mode lets you either fit inside the box without padding or fill it by cropping. Handy for profile pictures, blog thumbnails and any fixed-size target.
Settings
How to use
- 1
Add images
Drop the images you want to resize. Several images can be processed with the same settings.
- 2
Choose how to size
By width, by height, by percentage, or fit to a box. Aspect ratio is preserved automatically.
- 3
Run and save
Optionally change the output format, then press Run. The output size is appended to the file name.
Getting clean results
Downscaling uses a Lanczos3 filter. Compared with plain Canvas scaling it keeps thin lines and text crisp and avoids moiré. It is not suited to enlarging, which is why "Never enlarge" is on by default.
For the web, a long side of 1600–2000 px is plenty; anything larger just makes the file bigger without being displayed. Converting to WebP at the same time shrinks the file further.
Frequently asked questions
Is the aspect ratio preserved?
Always, for width, height and percentage modes. In fit-to-box mode, "Fit inside" and "Fill box" also preserve it; only "Stretch" ignores it and forces the exact box size.
Can I enlarge images?
Yes, if you turn off "Never enlarge". Enlarging interpolates pixels, so fine detail becomes soft. For sharp photo upscaling, an AI upscaler is planned for a future release.
Can I make several images exactly the same size?
Yes. Use fit-to-box with a width and height and choose "Fill box"; images of different proportions are all cropped to the same dimensions. Useful for thumbnails and galleries.
What is the output file name?
The output dimensions are appended to the original name. For example photo.jpg resized to 800 px wide becomes photo_800x600.jpg.
Help us improve the service
If a conversion fails, sending us the circumstances helps us track down the cause. Knowing which devices and formats fail most often, and how long processing takes, lets us revise the supported formats and fix the bugs behind them. If you don't mind, leaving this on is a real help.
What is sent
The tool you used and the settings you chose (output format, quality, etc.), your device specs (GPU, memory, core count), the input format with a rough size, how many files succeeded or failed and how long it took, and the error type and details when something fails.
What is never sent
The files themselves, file names, text, subtitles or prompts you add to a video, and IP addresses. The data goes only to this site's own server, never to a third-party service.