File Conversion
What It Does
Resizes and compresses images right in your browser. Scale by exact pixel dimensions, by a percentage, or to a target maximum file size, choose how the image fits the box, adjust quality, and download one file or all of them as a ZIP. Nothing is uploaded.
How to Use It
- Drop images onto the box (or click to choose). You can add up to 30.
- Pick a resize mode: by dimensions, by percentage, or by max file size.
- Set the size (and, for fixed boxes, a fit mode) and — for JPEG/WebP — a quality level.
- Click “Resize”, then download each result or “Download all (ZIP)”.
Options Explained
| Option | Description |
|---|---|
| Resize mode | By dimensions (exact px), by percentage (scale), or by max file size (quality is searched to hit the ceiling). |
| Width / Height | Target pixel dimensions; with Lock aspect ratio on, one drives the other. |
| Scale | Uniform percentage scale of the source (percentage mode). |
| Max size | The largest allowed output file, in KB (file-size mode). |
| Fit mode | Contain (letterbox), Cover (crop to fill), or Stretch (distort) when the box aspect ratio differs. |
| Don’t upscale | Never make the image larger than the original. |
| Quality | 1–100 for JPEG/WebP. Higher = better quality, larger file. PNG ignores this. |
| Background | Color used for letterbox padding and to flatten transparency for JPEG. |
| Filename pattern | Template for output names; supports {name}, {ext}, {w}, {h}. |
Drag & drop images here, or click to choose
PNG · JPEG · WebP · BMP · GIF · SVG (max 30, ≤ 30 MB each)
🔒 Processed entirely on your device — nothing uploaded.
About Resizing & Compression
There are two independent levers for shrinking an image. Resizing reduces the pixel dimensions — a 4000×3000 photo scaled to 1000×750 has one-sixteenth the pixels, which is usually the biggest win. Compression (quality) trades visual fidelity for smaller files within the same dimensions, and only applies to lossy formats like JPEG and WebP (PNG is always lossless).
The fit mode matters when the target box has a different shape than the source: contain keeps the whole image and pads the edges, cover fills the box and crops the overflow, and stretch distorts to fit exactly. Because this tool re-encodes from raw pixels using your browser’s built-in image engine, EXIF orientation is baked in and metadata such as GPS tags is dropped — a small privacy bonus when sharing images. Everything happens locally; your files never leave your device.