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Create a QR code for a link, Wi-Fi, WhatsApp, contact and more, or read one from a photo.
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- Works on any device
Fill in the details to see your QR code.
PNG for phones, chats and websites. SVG and PDF stay sharp at any size, which is best for printing. Tip: point your phone camera at the preview to test it.
3. Style (optional): colors, dots, logo
Choose a photo or screenshot or drag it here
Works with photos of printed codes, screenshots and image files.
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Aspect ratio calculator
Find the ratio of any size, the missing width or height, and crop sizes for 16:9, 9:16, 4:5 and more.
- Free
- No sign-up
- Works on any device
About Aspect ratio calculator
Finds the simplified ratio of any width and height, calculates a missing side when you keep the ratio, and suggests crop sizes for 16:9, 9:16, 4:5 and others. The formula is new height equals new width times original height divided by original width. Avoids stretched images when resizing.
How to use Aspect ratio calculator
- Open your file above. It stays on your device.
- Adjust the settings and preview the result.
- Download the finished file.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Available in 10 languages.
Also known as
Frequently asked questions
How do I resize without stretching?
Keep the same ratio: multiply the new width by original height and divide by original width to get the matching height. This tool does that calculation for you.
Is Aspect ratio calculator free?
Yes. Aspect ratio calculator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.