Paperix is a compact, fast paper-size reference tool that runs entirely offline and requires no permissions, making it a handy utility for designers, print professionals and students who need accurate format data without sending anything off-device. The app lets you compare two paper sizes with a scaled visual preview, convert measurements across common units and browse presets for ISO, US and JIS standards, so you can check dimensions, area and aspect ratios quickly. Paperix keeps calculations local and surfaces visual charts and conversion cheat-sheets for immediate reference.

Key Features

⭐ Compare: pick any two paper sizes and view a scaled visual preview side-by-side; width, height, area and aspect ratio shown in mm, cm and inches.

⭐ Convert: convert values instantly between mm, cm, inch, pt and px at 72 / 96 / 150 / 300 PPI with a single input and tap.

⭐ Presets: browse a full library of ISO A, ISO B, US (Letter, Legal, Tabloid, Executive) and JIS sizes; filter by series and inspect detailed breakdowns.

⭐ Reference charts: visual scale charts and a conversion cheat sheet reveal how ISO A, ISO B and US formats relate to each other.

⭐ Privacy & offline: Paperix runs 100% offline with zero permissions requested and a privacy policy accessible in-app.

Advantages

✅ Works entirely on-device so calculations are fast and private.

✅ Requires no permissions and does not collect user data.

✅ Clean Material Design 3 interface with a crisp blue-and-white theme for easy reading.

✅ Covers A0–A8, B0–B7, JIS B0–B6 plus common US formats and provides pixel dimensions at multiple PPIs.

✅ Shows aspect ratio and area for every paper format to aid layout and print planning.

Disadvantages

❎ Offline-only design means there are no cloud sync or online collaboration features.

❎ Focused solely on reference and conversions, so it doesn't offer layout editing or print workflow tools.