Using AI to Detect Resume Formatting Errors for ATS Scores

Quick summary: AI can automatically scan your resume for formatting glitches that trip up Applicant Tracking Systems (ATS), helping you submit a clean, high‑scoring document.

Why Formatting Matters More Than You Think

When you upload a resume to an ATS, the system parses text, extracts keywords, and ranks candidates. Even a tiny stray tab, an inconsistent bullet style, or a hidden table can cause the parser to misread sections, drop crucial information, or assign a low relevance score. According to a recent Jobscan study, up to 30% of resumes are rejected before a human ever sees them due to formatting errors.

The hidden cost of bad formatting

• Lost keywords: Missed bullet points mean missed keyword matches.
• Skewed experience timeline: Misaligned dates can appear as gaps.
• Reduced readability: Recruiters spend 6 seconds on average per resume; a messy layout pushes them away.

Enter AI‑driven formatting detectors. By analyzing the raw file structure, these tools flag issues before you click Submit, giving you a chance to fix them and improve your ATS score.

How AI Detects Formatting Errors

AI models trained on thousands of ATS‑compatible resumes learn the signature of a clean document. They look for:

1. Inconsistent fonts or sizes – e.g., a 12‑pt heading mixed with 11‑pt body text.
2. Improper use of tables – many ATSes cannot read tables; AI warns you to convert them to plain text.
3. Broken bullet points – mixed symbols (•, –, *) confuse parsers.
4. Hidden characters – non‑breaking spaces, line‑break codes, or invisible formatting tags.
5. Excessive white space – large gaps can be interpreted as separate sections.

The AI runs a syntactic analysis (checking markup) and a semantic check (ensuring headings match expected sections like Experience, Education, Skills). The result is a concise report with actionable items.

Step‑By‑Step Guide: Using Resumly’s ATS Resume Checker

Tip: Resumly offers a free ATS Resume Checker that does exactly this.

1. Upload your draft – Drag‑and‑drop a .docx or PDF file.
2. Run the AI scan – The engine parses the document in seconds.
3. Review the error list – Errors are grouped by type (font, table, bullet, etc.).
4. Apply fixes – Use Resumly’s built‑in editor or your preferred word processor.
5. Re‑scan – Confirm that the score improves; a typical clean resume jumps 15–25 points in ATS compatibility.

Quick checklist for a clean ATS‑ready resume

• Uniform font (e.g., Arial 11 pt) throughout.
• No tables or text boxes; use simple headings.
• Consistent bullet style (single symbol).
• Plain text dates (MM/YYYY).
• No hidden characters (use Show/Hide in Word).
• Save as .docx for best parsing.

Real‑World Example: Before & After

Before AI scan (excerpt):

Experience
• Software Engineer – Acme Corp
   • Developed API
   – Optimized DB
Education
   • B.Sc. Computer Science

Issues: mixed bullet symbols, extra indentation, missing section header formatting.

After AI‑guided fix:

Experience
- Software Engineer – Acme Corp (Jan 2020 – Present)
  - Developed RESTful API used by 10+ internal tools.
  - Optimized database queries, reducing latency by 35%.

Education
- B.Sc. Computer Science, University of XYZ (2015‑2019)

The ATS parser now correctly identifies two sections, extracts dates, and matches keywords like API and database.

Integrating Formatting Checks Into Your Job‑Search Workflow

1. Draft with Resumly’s AI Resume Builder – Start on a clean template that follows ATS best practices. (AI Resume Builder)
2. Run the ATS Resume Checker – Spot formatting errors early.
3. Polish your cover letter – Use the AI Cover Letter tool to keep tone consistent.
4. Practice interview answers – The Interview Practice feature helps you rehearse after your resume passes the ATS.
5. Auto‑apply with confidence – Once your resume scores high, feed it into Resumly’s Auto‑Apply to submit to multiple postings.

By embedding the formatting check at the start, you avoid costly re‑submissions and keep your application pipeline moving.

Do’s and Don’ts of Resume Formatting (AI‑Approved)

Frequently Asked Questions

1. Does AI catch every formatting mistake?

AI catches the majority of structural issues (fonts, tables, bullets). Manual review is still recommended for content relevance.

2. Can I use the ATS Resume Checker for PDFs?

Yes, but .docx files retain more formatting data, leading to more accurate scores.

3. How much does a formatting error affect my ATS score?

A single table can drop the score by 10–20 points; multiple hidden characters can cause a 30‑point penalty.

4. Is the Resumly checker free?

The basic scan is free; premium users get unlimited scans and detailed remediation suggestions.

5. Will fixing formatting guarantee an interview?

No, but it removes a major barrier. Combine clean formatting with keyword optimization for best results.

6. How often should I re‑run the checker?

After each major edit or when tailoring the resume for a new industry.

7. Does the AI suggest content changes?

The formatting module focuses on layout, but Resumly’s Resume Roast provides content feedback.

8. Can I integrate the checker with my ATS?

Export the cleaned .docx and upload it directly; many ATS platforms accept the same file.

Mini‑Conclusion: The Power of AI‑Driven Formatting Checks

Using AI to detect resume formatting errors before submission is a low‑effort, high‑return strategy. It eliminates hidden ATS blockers, boosts your compatibility score, and lets you focus on tailoring content and preparing for interviews. Pair the AI checker with Resumly’s AI Resume Builder, Cover Letter, and Interview Practice tools for a full‑stack job‑search advantage.

Next Steps: Put Your Resume Through the AI Test Today

1. Visit the Resumly homepage.
2. Upload your current resume to the ATS Resume Checker.
3. Follow the AI‑generated checklist and re‑scan until your score climbs above 80.
4. Use the cleaned resume with Resumly’s Auto‑Apply to start sending applications.

A well‑formatted resume is the foundation; AI ensures that foundation is rock‑solid. Happy job hunting!