What Is an ATS and How It Reads Your CV

If you have applied for jobs at any large company and never heard back, there is a reasonable chance no human ever opened your CV.

Most medium and large employers now run applications through an applicant tracking system — software that receives your CV, converts it to text, and files it into a database that recruiters search. Roughly three quarters of large employers use one, and many mid-sized companies do too.

The good news is that ATS software is far less clever than people fear. It does not judge your career or score your personality. It reads text. Most CVs that fail do so for mechanical reasons that take ten minutes to fix.

What an ATS actually does

When you submit a CV, the system does three things.

It parses your file into plain text. Every visual choice you made — columns, colours, tables, icons — is stripped away. What remains is a stream of words.

It sorts that text into fields. Name, contact details, work history, education, skills. It looks for familiar headings and structures to work out which text belongs where.

It makes your CV searchable. A recruiter with 400 applications searches for "project manager PMP Salesforce" and reviews whoever comes back.

That third step is where the myth of automatic rejection comes from. Most systems do not reject anyone. They just fail to surface you, which amounts to the same thing.

What the software cannot read

These are the mechanical failures, roughly in order of how often they cause problems.

Text inside images

If your name is part of a graphic header, or your skills are a designed infographic, the parser sees nothing. Anything that matters must be real, selectable text.

Quick test: open your CV, try to select the text with your cursor, and copy it into a blank document. Whatever you cannot select, the ATS cannot read.

Two-column layouts

The most common problem with designed CVs. Parsers read the underlying document order, which often does not match what you see. A sidebar of skills alongside your work history can end up interleaved — a skill, then a job title, then another skill — and the result is unusable.

Some modern parsers handle columns well. Many do not, and you cannot tell which one you are submitting to.

Headers and footers

Contact details in the document header often get dropped entirely. A parser that cannot find your email may discard the application outright.

Put your phone number and email in the body of the document, at the top.

Tables

Tables read unpredictably. A skills matrix laid out in a table can come through as a jumble of disconnected words.

Skill bars and rating dots

A bar filled to 80% next to "Excel" tells the software nothing, because there is no text saying 80%. Rating dots are worse — the parser sees decorative characters, or nothing.

These also tell a human very little. What does four stars out of five in Python mean, exactly?

Unusual section headings

The parser looks for conventional labels. "Where I've Been" instead of "Work Experience", or "My Toolkit" instead of "Skills", makes it harder to file your text correctly.

Creative headings are a small pleasure that costs you real accuracy.

The file format question

PDF is fine for most modern systems, provided it was exported from a word processor rather than scanned or generated as an image. A scanned PDF is a picture, and contains no text at all.

Word (.docx) is the safest option when a portal offers the choice, because it is what parsers were originally built around.

Simple rule: if the application form lists accepted formats, use the first one listed. That is usually the one the system handles best.

Keywords, without the nonsense

There is a lot of bad advice about keywords. Two things are true.

The words on your CV should match the words in the job advert, where they honestly apply. If the advert says "stakeholder management" and your CV says "working with clients", a recruiter searching for the first phrase will not find you. Same skill, different words.

Keyword stuffing does not work and looks bad. Hidden white text, or a wall of terms at the bottom, is detectable and gets applications discarded. A human reads your CV at the next stage.

A reasonable approach: read the advert, note the five or six terms that recur, and make sure those exact phrases appear naturally in your experience section — describing things you have actually done.

A structure that parses cleanly

Nothing exotic. This works:

1. Name — plain text, largest thing on the page
2. Contact details — phone, email, city, LinkedIn, on one or two lines in the body
3. Professional summary — three or four lines
4. Work experience — reverse chronological. Job title, company, location, dates, then bullets
5. Education — qualification, institution, dates
6. Skills — a plain comma-separated list or simple bullets
7. Certifications, languages, anything else

Use standard headings. Use ordinary bullet characters. Write dates consistently — "Mar 2022 – Present" throughout, not a mix of formats.

What still matters to the human

Passing the parser gets you into the database. A person still decides whether to call you, and they read differently.

Results, not duties. "Managed the social media accounts" describes a job description. "Grew Instagram following from 4,000 to 26,000 in eight months" describes a person who achieved something.

Numbers wherever you have them. Team size, budget, volume, percentage change, time saved. Numbers make claims checkable, and checkable claims are more persuasive.

Length. One page under five years of experience, two pages beyond that. Beyond three pages, most readers skim and stop.

Recency. Your last two roles should take up most of the space. A job from 2013 needs a line, not five bullets.

When to ignore all of this

If your CV is going directly to a person — emailed to a hiring manager, handed over at an interview, attached to a portfolio — none of the parsing constraints apply. Use the designed version with the sidebar and the accent colour. It will be read by eyes, not software.

The practical answer is to keep both. One plain version for portals and company websites, one designed version for people. The content is identical; only the layout changes.

Our free CV builder grades every template as ATS-Safe, ATS-OK or Design, so you can see at a glance which one to use where — and switch between them without retyping anything.