About Image Resizer
Resize any JPG, PNG, or WebP image to exact pixel dimensions — or scale it by percentage — right in your browser. Lock the aspect ratio to avoid stretching, choose an output format and quality, and see the exact output file size before you download. Nothing is uploaded to a server.
How to Use
- Drag and drop an image, or click to choose one (JPG, PNG, WebP, and more).
- Set the size: enter an exact width and height, pick a scale like 50%, or a common size like 1920×1080.
- Keep 'Ratio locked' on so the image isn't stretched; choose the output format and, for JPG/WebP, the quality.
- Check the actual output dimensions and file size, then download.
Why Use This Tool?
- Accurate — built on precise, well-tested mathematical formulas.
- Instant — all calculations happen client-side for zero latency.
- Private — no data is sent to any server; your information stays on your device.
- Free — no sign-up, no limits, no hidden costs.
Frequently Asked Questions
How do I resize an image without stretching it?
Keep 'Ratio locked' on, so changing the width updates the height proportionally (and vice versa) and the original shape is preserved. The fit-to-size presets also respect the lock and scale the image within the target size rather than distorting it.
How do I resize an image without losing quality?
Resize to the size you actually need rather than enlarging beyond the original (upscaling can't add detail). Keep the aspect ratio locked to avoid distortion, and for photos pick JPG or WebP at 80–90% quality, or PNG for graphics and screenshots. Some quality loss is unavoidable with lossy formats, but at these settings it's usually not visible.
Can I resize an image to exact pixels?
Yes. Enter the exact width and height in pixels. If you need a non-proportional size, unlock the aspect ratio first — note that this can stretch the image.
Can I resize JPG, PNG, and WebP images?
Yes — the tool reads JPG, PNG, WebP (and common formats like GIF and BMP), and can output JPG, PNG, or WebP, or keep the original format. JPG has no transparency, so a transparent PNG/WebP converted to JPG gets a white background; keep PNG or WebP to preserve transparency.
Does resizing reduce the image file size?
Usually, but not always. File size depends on the dimensions, the format, the compression/quality setting, and the image content. Resizing to fewer pixels normally makes the file smaller, but converting format or raising quality can increase it. This tool shows the actual output size after resizing so you can see the real result.
Are my images uploaded to a server?
No. All resizing happens entirely in your browser using the HTML5 Canvas API — your images never leave your device.