buncha.tools
Width
:
Height
Aspect ratio
16:9
1920 × 1080 pixels
16:9
Resize (keep ratio)
×
Common ratios

Pairs well with

Print DPI Calculator
Two modes: 'I have a print size, what DPI do I get…
EXIF Stripper
See what hidden metadata is in your photos (GPS, c…
Image to PDF
Combine multiple images into a single PDF — drag t…
PDF Watermark
Add a text or image watermark to every page of a P…

About Aspect Ratio Calculator

Calculate and convert aspect ratios for images and video.

Everything happens on your device. Close the tab and it's gone.
b
Built browser-first. Run by one developer.
Every tool runs on your device. No tracking pixels, no sign-up to start. The numbers below are pulled live from the registry.
386
Free tools
Across 14 categories
7
Visual editors
PDF · image · video · audio
34
Curated kits
By profession + lifestyle
27
AI tools
Powered by Claude API
Files never uploadNo tracking pixelsNo sign-up neededWorks in any modern browser
The handful of AI tools (paraphrase, summarise, blog, captions, etc.) send your prompt text to Anthropic's Claude API to do the work. Files, images, PDFs and video never leave your device. Pick the tools that fit your privacy comfort.