Aspect Ratio Calculator
100% Client-SideAspect Ratio Calculator simplifies a width and height into a ratio and scales it to a new size. It runs entirely in your browser, so your data is processed locally in memory and never uploaded to a server. It is 100% free and needs no signup or account.
Example
width: 1920 height: 1080 targetWidth: 1280
Input
No input needed. Adjust the options and press Run.
Output
Ctrl/⌘ + Enter: run · Esc: clear
How to use Aspect Ratio Calculator
- 1
Open Aspect Ratio Calculator
Add your file or enter your input in the Aspect Ratio Calculator workspace above. Drag and drop works, and nothing is uploaded.
- 2
Choose your options
Adjust any settings you need, such as order, quality, size or format. The tool does the rest on your device.
- 3
Process and save
Run Aspect Ratio Calculator and download or copy the result. It happens instantly in your browser, and your data stays private.
In-Browser vs. Server-Based Tools
| Feature | AnyTool Studio (in-browser) | Traditional server-based |
|---|---|---|
| Privacy | Files stay on your device and are never transmitted. | Files are uploaded to and processed on a third-party server. |
| Speed | No upload or download wait; speed depends on your device. | Upload and download time grows with file size and connection speed. |
| File size limits | No imposed limit; bounded by your device's memory. | Commonly capped per file or per task, with higher limits on paid plans. |
| Account required | No signup or login. | Often required for larger files or repeated use. |
| Data retention | Nothing to retain; data is cleared from memory. | Files may be stored for a period before deletion. |
Frequently Asked Questions
No. Aspect Ratio Calculator runs entirely in your browser using JavaScript. Your data is read into your device's memory, processed there, and saved straight to your downloads. Nothing is sent over the network, so no one else ever receives a copy.
AnyTool Studio sets no upload limit because nothing is uploaded. The practical limit is your device's available memory, so very large files may be slow on phones or older computers. If Aspect Ratio Calculator struggles with a big file, try a smaller one.
Yes. Because your data never leaves your device, confidential contracts, financial records and personal files are not exposed to a third-party server. Everything is cleared from memory when you close the tab.
Yes. Aspect Ratio Calculator is 100% free, with no signup, no account and no usage caps.
Related guide
How to Convert Units (Length, Weight, Volume, and More)
Convert between length, mass, volume, speed, time, data size, area and temperature units using plain-English input, in your browser.
How to Calculate and Scale an Aspect Ratio
Simplify a width and height into a ratio, and scale it to a new size while keeping the proportions, in your browser.