IMAGE TOOL · CLIENT-SIDE
Image Resizer
Resize by exact dimensions or percentage, keep or break the aspect ratio, and export to JPEG, PNG, WebP, AVIF, or BMP. Batch resize as many files as you need — nothing is ever uploaded.
Drop images here, or browse
JPEG, PNG, WebP, SVG, GIF — unlimited files
⚠ Upscaling detected: the target size is larger than the original resolution and may soften details.
Use {name}, {w}, {h} placeholders.
Quick reference
- ● PNG & BMP export losslessly — quality is memorized, not applied.
- ● SVG input is rasterized using its declared (or viewBox) resolution.
- ● Audio-less GIFs are uploaded as stills.
- ● Everything runs on-device; your photos never touch a server.
Why it matters
Oversized images are the #1 cause of slow websites. A 4000×3000 photo from your camera can be resized to 1200px on the long edge and look identical on screen while cutting megabytes off every page load — improving Core Web Vitals and SEO rankings.
Resize without losing quality
Our resizer uses high-quality Canvas interpolation. Downscaling retains full visual fidelity; keep the aspect ratio on and your images are resized without any stretching. For web publishing we recommend exporting WebP at quality 80–85 — the sweet spot between file size and clarity.
Drop any number of photos into the queue.
Enter exact dimensions or a percentage scale.
Download individually or grab a single ZIP.
Frequently Asked Questions
Will resizing an image reduce its quality?
Downsizing an image keeps its quality profile intact. Upsizing beyond the original resolution may soften details, so the tool warns you before scaling up.
Can I keep the aspect ratio?
Yes. With "Keep Aspect Ratio" enabled, entering a width or height automatically calculates the matching other dimension to avoid distortion.
Are my images uploaded to a server?
No. All resizing runs locally in your web browser using the Canvas API. Your photos never leave your device.
Which output formats are supported?
JPEG, PNG, WebP, AVIF, and BMP. Quality is adjustable for lossy formats.