Resize Images
Resize by percentage, pixel dimensions, or preset. Free, no signup.
Supports JPG, PNG, WEBP, GIF, TIFF, BMP, HEIC, AVIF, SVG — up to 50MB per file, 50 files at once.
Drag and drop files or folders here, or
All image formats — up to 50MB each, or 50 from a folder
Ctrl+Z undo · Ctrl+Y redo
Leave one blank to auto-calculate from aspect ratio.
Preserve camera info, GPS, and other metadata
Keyboard Shortcuts
General
How It Works
1. Upload
Drop your images or a folder. Up to 20 files, or 50 from a folder.
2. Configure
Choose percentage, pixel dimensions, or a preset. See the result before resizing.
3. Download
Download individually or as a ZIP. Files auto-delete after 1 hour.
Resize by Preset
Jump straight to a specific size — each page is pre-configured for that dimension.
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Frequently Asked Questions
Percentage scales your image by 1-99% of its original size. Pixels lets you specify exact width and/or height — leave one blank to preserve the aspect ratio. Presets resize to common targets like 1080p, 720p, 480p, or thumbnail (300 × 300).
KoalaPic uses high-quality LANCZOS resampling to minimize quality loss. The default quality setting of 85 offers an excellent balance between file size and visual fidelity. You can adjust the quality slider to suit your needs.
Yes. By default the output format matches your input (a PNG stays a PNG), but you can choose JPG, PNG, WEBP, or AVIF from the output format pills. This lets you resize and convert in a single step.
Yes. Your images are processed on our server and automatically deleted after 1 hour. We do not view, share, or use uploaded images in any way. No account is required.