How to use
Resize images to custom pixel dimensions. Choose your file or enter the requested content, select options, then run the tool and download the result.
Resize without distorting the image
Image dimensions are measured in pixels. If you change width and height independently, the subject may appear stretched or compressed. Keeping the aspect ratio locked preserves the original proportions; cropping is the better option when a different shape is required. Reducing dimensions can lower file size, while enlarging a small image usually makes it softer.
Choose output dimensions
- Start from the display size required by the website or app.
- For high-density screens, the source may need more pixels than the CSS display width.
- Preview the image at its final size on mobile and desktop.
- Keep the original in case another layout needs a different size.
Resizing cannot restore lost detail. If the result looks blurry after enlargement, find a larger source image rather than increasing the dimensions again.
Privacy and limitations
Processing happens locally in your browser. The page loads standard analytics and, for PDF tools, a third-party PDF library. Some advanced document features may not survive conversion. Check outputs before relying on them.
Frequently asked questions
Are my files uploaded?
No. File processing runs in your browser; the selected file is not sent to a Tolvix processing server.
Will all features be preserved?
Not always. Browser-based conversion may not preserve every annotation, form, font or advanced document feature.