Resize images
Set a width, a height, or a percentage and apply it to a whole folder at once. High-quality progressive downscaling, so shrunk images stay sharp instead of going crunchy.
How to resize images
- Add your images.
- Choose how to resize. Width and Height keep the aspect ratio and are what you want most of the time. Exact forces both numbers and will distort the image if the ratio does not match. Percentage scales everything relative to its own size, which is the right choice for a mixed batch.
- Leave Never enlarge beyond the original ticked unless you deliberately want to upscale — enlarging cannot add detail that was not captured.
- Press Resize. Output files are named with their new dimensions, so nothing overwrites your originals.
Why this one is different
Almost every free file tool works the same way: you upload your file to a company's server, their machine does the work, and you download the result. That means a copy of your document sat on someone else's hard drive, governed by a privacy policy you did not read.
Filebench does the work in the browser tab you are already looking at. There is no upload step because there is no server to upload to. The practical consequences: no file size limit, no queue, no account, no watermark, and it keeps working if your connection drops after the page loads.
| Filebench | Typical online converter | |
|---|---|---|
| Your file leaves your device | Never | Every time |
| File size limit | None | Often 10–100 MB free |
| Sign-up required | No | Usually, past a few files |
| Watermark on output | No | Sometimes |
| Works offline after loading | Yes | No |
Questions
Will resizing blur my images?
Downscaling in one big step is what causes the mushy look. This tool halves the image repeatedly until it is close to the target and only then makes the final step, which preserves far more detail. Upscaling will always look soft — there is no extra detail to recover.
What size should I use for the web?
For a full-width hero, 1920px wide is generous and 2560px covers high-density displays. For an image inside an article column, 1200–1600px is plenty. For a thumbnail, 400px. Serving anything larger than roughly twice its display size is wasted bandwidth.
How do I resize to an exact aspect ratio like 16:9?
Use Exact width × height and enter matching numbers — 1920 × 1080 for 16:9, 1080 × 1080 for square. Note that this stretches rather than crops, so use it on images that are already close to the target ratio.
Can I resize many images to different sizes at once?
Not in a single pass — one setting applies to the whole batch. Run the batch once per target size; the tool is fast enough that this is rarely a problem.
Does it keep transparency?
Yes, when the output format supports it. PNG and WEBP keep the alpha channel. JPG cannot, so transparent areas are filled with white.
Other tools
Convert images
Swap between PNG, JPG and WEBP in bulk. Choose a background colour when converting transparent images to JPG.
Compress images
Cut image weight with a quality slider and an optional size cap. Each result shows the percentage saved.
Images to PDF
Combine images into one PDF with A4, Letter or fit-to-image pages and drag-to-reorder.