Free ATS Resume Checker & Optimizer

An ATS resume checker analyzes your resume the way an applicant tracking system would. It identifies formatting issues that cause parsing errors, checks keyword alignment with the job description, and scores your resume's overall ATS compatibility.

Resume Optimizer Pro is built by former ATS software engineers and uses Sovren and Textkernel parsing standards — the same engines used by major employers. Most free ATS checkers use basic keyword matching. Our tool checks actual parsing compatibility, not just word counts.

The checker detects common ATS-breaking issues including: tables and multi-column layouts that scramble content order, graphics and images that are invisible to parsers, non-standard section headers that ATS systems can't categorize, and date formats that fail to parse correctly.

A job description is optional but recommended. Without one, the tool checks formatting and parsing compatibility. With a job description, it also analyzes keyword alignment and gives you a match score specific to that role.

Upload a .docx or .pdf resume file. For best ATS compatibility, we recommend .docx format, as some PDF files — especially those with complex layouts or created from design tools — can cause parsing issues with certain ATS systems.

Yes. You can check your resume and view your full ATS compatibility report for free. Downloading the optimized resume requires a paid plan, which also unlocks full editing, template, and cover letter features.

Upload your resume using the free checker above. It will parse your resume using the same engines that major ATS platforms use and flag any issues: broken formatting, unreadable sections, missing standard headings, or keyword gaps. If your score is above 70% and no formatting issues are detected, your resume is ATS-friendly.

Resume Optimizer Pro is built on Sovren and Textkernel parsing standards, which are the foundation for most major ATS platforms including Workday, Greenhouse, Lever, iCIMS, and Taleo. This means the checker accurately represents how the majority of employer ATS systems will read your resume.

Submit as .docx whenever possible. Word documents have the highest parsing success rate across all ATS platforms. PDFs can work, but complex layouts, custom fonts, or design-tool exports often cause parsing failures. If the job posting specifically requests PDF, use a simple, text-based PDF created from Word or Google Docs.

ATS parsers read resume content as a linear text stream. When they encounter a table, they collapse all cells into a single sequence, which scrambles the reading order. A two-column layout showing "Software Engineer | Acme Corp | 2020-2023" becomes a string of disjointed text. The result is a job title matched to the wrong company, missing dates, or content that fails to map to any recognized field. Use a single-column layout with clear section headers instead.

Standard headers that all major ATS platforms recognize: Work Experience, Professional Experience, Employment History, Education, Skills, Technical Skills, Certifications, Summary, and Objective. Creative alternatives like "My Journey," "What I've Built," or "Areas of Expertise" often fail to categorize correctly, leaving the content unattached to any structured field. Stick to conventional header names to ensure your content is classified and scored accurately.