How to Format Your Resume for ATS: The Casing and Spacing Guide

Why Your Resume Might Be Getting Ignored

In 2026, over 90% of large companies use Applicant Tracking Systems (ATS) to filter resumes before a human ever sees them. One of the biggest reasons qualified candidates are rejected isn’t their experience—it’s messy formatting.

If your resume has inconsistent capitalization, broken lines from a PDF export, or “All Caps” headers that the system can’t read, you might be invisible to recruiters.

1. The Capitalization Rule

Avoid using ALL CAPS for long sentences or entire sections. While you want your headings to stand out, many ATS algorithms struggle to parse long strings of uppercase text, often misreading them as gibberish.

  • Bad: PROJECT MANAGER WITH 10 YEARS OF EXPERIENCE IN AGILE
  • Good: Project Manager with 10 Years of Experience in Agile

Fix it instantly: If you’ve already typed your resume in the wrong case, paste it into the Zappelle Case Converter and select “Title Case” or “Sentence case” to fix it in one click.

2. Watch Your Character Limits

Some online application portals have hidden character limits for your “Executive Summary” or “Job Description” fields. If you copy and paste a long paragraph and it gets cut off mid-sentence, it looks unprofessional.

The Pro Tip: Before uploading, paste your text into the Word Counter Pro to ensure you aren’t exceeding standard 500-character limits for text boxes.

3. Clean Up PDF “Broken Lines”

If you are copying text from an old resume PDF to a new template, you’ll often see “hard breaks” at the end of every line. An ATS might see these as separate paragraphs, ruining your resume’s flow.

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