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ATS & Optimization 6 min read

ATS Formatting Rules: Safe Fonts, Margins, Section Breaks & Columns

A technical breakdown of document formatting: character encoding, vector icons, margin bounds, and table parsing safety.

David Chen

David Chen

Staff Software Architect & Tech Hiring Lead

Published: 2026-06-18|Updated: 2026-08-02

Editorial Review & Standards: This guide has been reviewed and fact-checked against enterprise ATS specifications (Greenhouse, Workday, Lever) and corporate recruitment benchmarks by our editorial board.

The Technical Mechanics of Resume Parsers

ATS engines like Workday and Greenhouse convert your PDF binary into raw text streams. Unsupported glyphs, decorative ligature fonts, and nested tables can scramble your work history.

The Safe Document Checklist

  • Page Margins: 0.5 to 1.0 inch on all sides.
  • Standard Font Sizes: 10-11pt for body text; 14-16pt for headings.
  • Section Dividers: Use clean CSS/border lines rather than inserted shape graphics.
David Chen
Written by

David Chen

Staff Software Architect & Tech Hiring Lead

Ex-FAANG engineering manager who has interviewed and hired 200+ engineers, frontend developers, and cloud architects.

Frequently Asked Questions

Are graphical progress bars for skills ATS-friendly?

No. Parsers cannot decode visual bar charts and interpret them as blank space or garbage characters.

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