Applicant Tracking Systems, or ATS platforms, parse resumes to extract work history, skills, education, and contact information. When a resume PDF contains formatting that confuses the parser, qualified candidates get filtered out before a human ever sees their application. Converting a PDF resume into an ATS-friendly format means stripping the visual design elements that look good to human readers but jam the parsing algorithms while preserving the content structure that the ATS evaluates.
The most common ATS parsing failures come from multi-column layouts, text embedded in images, custom fonts with non-standard character encoding, tables used for layout rather than data, and headers and footers that repeat across pages. Each of these design elements can cause the ATS to read text out of order, skip entire sections, or fail to extract any text at all. PDF to Word conversion is the first step toward an ATS-optimized resume, but the conversion alone is not enough. The Word output needs manual cleanup to remove layout artifacts that the conversion process introduced.
WukongPDF's PDF Format conversion tools extract text from resume PDFs into editable Word documents. After conversion, the cleanup steps below transform the Word file into a parsed-friendly format that every major ATS platform reads correctly.
Why Standard PDF Resumes Fail ATS Parsing
ATS parsers read a PDF as a stream of characters with position coordinates on the page. When a resume uses a two-column layout with skills on the left and experience on the right, the parser may read across the page from left to right, interspersing skill keywords with job description sentences. The resulting parsed text is a jumbled mix that scores poorly on keyword matching even though the original resume contained all the right terms in the right places.
Custom fonts cause a different class of parsing failure. When a designer uses a decorative typeface or a font with ligature substitution enabled, the characters that appear on screen may not map to the Unicode code points that the ATS expects. The letter combination fi rendered as a single ligature glyph may be stored in the PDF as a custom character code that the ATS parser does not recognize. The parser either skips the character or substitutes a blank, breaking words and making skill keywords unrecognizable. According to a Jobscan analysis of over 100,000 resume submissions in 2024, formatting issues were the primary reason 27 percent of otherwise qualified resumes failed initial ATS screening (Jobscan, Resume ATS Compatibility Report, 2024).
Step 1: Convert the PDF Resume to an Editable Format
The first step is to extract the resume text from the PDF into a word processor where you can clean up the formatting. Open the PDF in a PDF-to-Word converter. Most online converters and desktop tools like Adobe Acrobat Pro handle this through an Export to Word function. The conversion produces a .docx file that preserves the visual layout of the original PDF. Open the .docx in Microsoft Word or Google Docs.
Review the converted document carefully. Common conversion artifacts include text boxes that have shifted from their original positions, tables that have split across pages, bullet points that have been converted to plain text dashes, and section headings that have lost their bold or larger-font formatting. Fix these artifacts now before proceeding to layout simplification. The goal is to have all resume content visible in the document and recognizable as structured information, even if the formatting is still complex.
Step 2: Simplify to a Single-Column Layout
Select all content in the converted document and paste it into a new blank document using Paste Special, Unformatted Text, or the equivalent plain text paste option in your word processor. This strips all formatting and produces a clean, single-column text stream. Reapply formatting manually: bold for section headings such as Experience, Education, and Skills. Bullet points for job description entries. Consistent paragraph spacing between sections.
While reapply formatting, use standard section heading labels that ATS parsers recognize. Use Experience rather than Where I Have Worked. Use Education rather than Academic Background. Use Skills rather than What I Bring. Standard heading labels match the field names that ATS platforms expect, improving the accuracy of section classification. List work experience in reverse chronological order within each section, with the most recent position first. The date format should be consistent throughout: Jan 2020 to Mar 2023 or 01/2020 to 03/2023, not a mix of both styles.
Step 3: Save in the Optimal ATS File Format
Most ATS platforms accept both .docx and .pdf formats, but .docx is generally the safer choice because it stores text as a structured XML document with clear character encoding. PDF can be the safer choice when you want to ensure that the formatting you see is the formatting the recruiter sees, but only after you have simplified the layout to a single column with standard fonts. If you submit a PDF, generate it from the cleaned Word document using Save As PDF, not from the original designed resume. This ensures the PDF inherits the clean, single-column structure and standard character encoding of the Word source.
Before saving the final file, run a quick ATS compatibility check. Copy all text from the document and paste it into a plain text editor such as Notepad. Does every word, date, and skill appear correctly? If the pasted text contains garbled characters, missing sections, or scrambled word order, the ATS parser will see the same problems. Fix any issues in the source document and repeat the plain text test until every character pastes correctly.
| ATS Problem | Why It Happens | Fix |
|---|---|---|
| Text not parsing at all | Resume is a scanned image, not digital text | Run OCR to create searchable text layer |
| Garbled or missing text sections | Complex PDF layout with tables, columns, or text boxes | Convert to DOCX, simplify to single-column layout |
| Skills and keywords not detected | Font encoding or ligatures prevent text extraction | Export as plain text, verify keyword presence |
Optimizing Keyword Placement for ATS Scoring
Beyond format compatibility, ATS platforms score resumes based on keyword density and placement. Include exact keyword phrases from the job description in your resume text. If the job description asks for project management and your resume says managed projects, the ATS may not match the phrase. Write project management somewhere in your experience or skills section alongside your natural phrasing.
Place key skills in a dedicated Skills section at the top of the resume, formatted as a simple bulleted or comma-separated list. Include both the full term and common abbreviations: Certified Public Accountant (CPA) covers both search patterns. Do not stuff keywords into white text or hidden layers to try to cheat the ATS. Most modern ATS platforms detect hidden text and flag the application. The keywords must appear in the visible, readable content that the recruiter will also see.
Testing Your Resume Against Real ATS Platforms
Several online services offer resume ATS compatibility scanning. Upload your cleaned resume PDF or DOCX, and the service simulates how a typical ATS parser would read the file, showing you which sections were detected, which skills were extracted, and how many years of experience the parser calculated. These scans are simulations, not the actual ATS that any specific employer uses, but they catch formatting and parsing issues that are common across all major ATS platforms.
After the scan passes without errors, submit your application with the ATS-friendly version of your resume. Keep the designed version for interviews and networking events where a human will see it first. Maintaining two versions, one for ATS parsing and one for human reading, is standard practice among professional resume writers and career coaches who understand that a visually impressive resume and a parseable resume serve different audiences in the hiring process.
Tracking Which Resume Version Went Where
When you maintain two versions of your resume, organization becomes important. Use a clear naming convention that distinguishes the ATS version from the designed version. Include your name, the job title or company, and the format designation in the filename: Smith_Jane_SoftwareEngineer_ATS.docx versus Smith_Jane_SoftwareEngineer_Designed.pdf. This prevents accidentally sending the designed version to an ATS or the plain-text version to a networking contact who expected a polished document.
Many job seekers also customize the ATS resume for each application by adjusting keyword emphasis to match the specific job description. After customizing, save a copy with the company name in the filename. A folder structure organized by application date and company name, with both the ATS and designed versions inside each application folder, keeps the version history manageable even across dozens of applications. An ATS-friendly resume is not a downgrade from a designed resume. It is a translation of the same qualifications into a format that the first-round screening infrastructure can read. Candidates who optimize for both the machine reader and the human reader give themselves the best chance of advancing past the initial screening stage. The small time investment in producing an ATS-compatible version of a resume is one of the highest-return activities in any job search, transforming hours of application effort into interviews that would otherwise be lost to formatting incompatibilities between a beautifully designed resume and the parsing algorithms that evaluate it.