Resize any width / height while keeping aspect ratio, with one-click presets for every social platform and cinema standard from 1:1 to 21:9.
| Field | Value |
|---|
Ratio = original width ÷ original height. When you lock width, the new height = new width ÷ ratio. Lock height: new width = new height × ratio.
"Calculate ratio" mode reduces width:height to its simplest integer form using the greatest common divisor.
Pixels to cm / Inches Converter (Print DPI)
Convert pixel dimensions to physical print size at any DPI/PPI, with bleed and safe-zone helpers.
Typography Scale Generator (Modular Type Scale)
Generate a modular type scale in rem, px and em from any base size and ratio, with line-height pairs.
Color Converter — HEX, RGB, HSL, OKLCH & Contrast
Convert any color between HEX, RGB, HSL, HWB, OKLCH and LCH, with WCAG contrast checking against any background.
Video Bitrate & File Size Calculator (H.264, H.265, AV1)
Calculate video file size from bitrate, resolution, FPS and duration for H.264, H.265, AV1 and ProRes.
Font Size Converter (pt, px, rem, em, %)
Convert font sizes between pt, px, rem, em and % for web and print typography.
