ToolzyLab
Resize JPG, PNG, WEBP, AVIF, BMP, or SVG — percentage, pixels, fit box, longest or shortest edge. Keep aspect, enable upscale, preserve format or convert globally. All local and private.
Everything runs in your browser. Mixed formats handled automatically.
Or choose files from your device.
📁 Limit: 500 files or 2 GB · 💾 Fully localImage resizing changes pixel dimensions; it is different from cropping and compression. Choose percentage, exact pixels, fit box, longest edge, or shortest edge according to the destination, keep aspect ratio unless stretching is intentional, and avoid upscaling when the source does not contain enough real detail.
Use percentage for proportional drafts, By Pixels for an exact width or height, Fit Box when both dimensions are maximum limits, and Longest or Shortest Edge for mixed orientations. A fit box keeps the whole image within bounds; it does not necessarily create an exact canvas size on both axes.
When the width and height change proportionally, circles remain circular and faces remain natural. If the destination demands an exact shape that differs from the source, resize alone cannot satisfy both dimensions without stretching. Crop to the required ratio or add canvas padding, then resize to the final pixels.
Upscaling interpolates extra pixels and can soften texture, text, and edges. Enable it only when a minimum dimension is mandatory and inspect the result closely. Choose Same or an output format based on transparency, compatibility, and quality needs; conversion and resizing are separate decisions even when completed together.
Verify the numeric requirement and the visual result before processing a large batch.
Keep Ratio enabled and set one dimension or use Fit Box, Longest Edge, or Shortest Edge. The other dimension will be calculated proportionally so the original shape remains intact.
Resizing changes the pixel dimensions of the whole frame. Cropping removes pixels from the edges and can change composition or aspect ratio. Use both when the destination requires a new shape and exact dimensions.
Only when the target aspect ratio matches the source. Otherwise crop to the target ratio or add padding before resizing. Forcing unrelated width and height values stretches the image.
Upscaling estimates new pixels from existing ones and cannot recover detail the camera never captured. Use the original high-resolution source, choose a smaller target, or use a dedicated upscaler with careful review.
Yes. Longest Edge, Shortest Edge, or Fit Box modes handle mixed orientations more predictably than one fixed width and height. Review both orientations before downloading the ZIP.
Keep the source format when compatibility and features already fit. Use PNG for crisp graphics or transparency, JPG for compact photos, and WebP for supported modern delivery. Inspect quality after any conversion.
Usually, because fewer pixels need storage, but encoding and format also matter. Compare actual bytes after export and avoid assuming a specific percentage reduction.
Use the current requirement for the exact placement, not a generic platform number. Website cards, hero images, avatars, feed posts, and stories have different slots and may change over time.