Aspect Ratio Converter — free & private
Change image aspect ratio (16:9, 1:1, 4:5) without distortion
Local browser workflow
Change image aspect ratios instantly in your browser. No image upload. Processing stays on your device. Everything runs on your device — free, no account required, and image files are not uploaded to PictureConvert. Related: Exact Pixel Resizer, Crop Image, and Resize Image.
Drag & drop your image
or click to browse files
Supports: JPEG, PNG, WEBP, AVIF (max 100MB)
- Processed locally
- No image upload
- No account required
- Images not stored by PictureConvert
After you resize
Compress for delivery, add a creative filter look, or remove EXIF before posting publicly.
What this tool does
This tool changes the proportional relationship between your image's width and height. It can either crop your image to fit a new shape or add background bars. For exact sizes, use Pixel Resizer.
Trust and privacy are built into the workflow. Nothing leaves your device during processing, and there is no account setup. That makes it suitable for personal photos, client assets, product shots, and everyday creative work.
How to use Ratio Convert
- Upload or drag your image into the tool above.
- Adjust the editing controls until the live preview looks right.
- Choose an output format (and quality when relevant).
- Download the edited image — processing stays on your device.
Tip: preview at a comfortable zoom, then export once you are happy — repeating lossy saves can add compression artifacts.
Key benefits
- Use 'Cover' mode if you want the image to fill the entire space (some parts will be cropped)
- Use 'Contain' mode if you need to show the whole image (bars will be added)
- Common ratios: 16:9 (Video), 1:1 (Square), 4:5 (Portrait), 9:16 (Stories)
- We automatically center the image for the best composition
Privacy note: no files leave your device. All edit steps run locally in your browser.
Correct Ratio vs Original
| Feature | Correct Ratio | Original |
|---|---|---|
| Shape | Specific (e.g. 16:9) | Original |
| Composition | Adjusted | Original |
| Use Case | Social / TV | General |
| Distortion | None | Potential |
Common use cases
Use this when you need your image to fit a specific shape—like a TV screen (16:9) or a social feed. If you just need a standard resize, use our Image Resizer.
After you finish, continue with related PictureConvert tools if you need another conversion, compression pass, crop, or metadata step — all without leaving the browser.
FAQs
Reviewed by the PictureConvert team
. This page is maintained so recommendations stay practical and current for Ratio Convert, with a focus on private, browser-local processing.
Related Tools
More options in Resize and Crop and nearby workflows.