Stop writing booleans that return nothing useful.
Most boolean strings miss candidates or pull in noise. This tool applies a proven 10-step methodology to your search string. Automatically, from your job description.
Free·No credit card·No time limit
Three ways to write a boolean. None of them work well.
Writing it yourself
You start with an empty search bar. Type a few titles, throw OR between them, add a NOT. Done. The problem: you write down what you already know. Synonyms you don't think of, vendor names you don't know, qualifiers you miss. Your search only finds candidates who match your vocabulary exactly.
Asking ChatGPT
You paste your vacancy into ChatGPT and ask for a boolean. You get back an impressive string. Long. Complex. Full of parentheses. And full of mistakes. Associative terms LinkedIn doesn't understand. Umbrella terms that pollute your search. No containment check. No noise-term filtering. It looks good. It doesn't work.
Using a boolean builder
Most builders give you an empty form. You fill in the terms. The tool wraps them in parentheses and operators. Tidy. And useless. Because the problem was never the syntax. The problem is which terms you choose.
The difference between a search that returns 600 irrelevant profiles and one that finds 80 relevant candidates is not in the operators. It's in the methodology behind them.
A boolean is only as good as the methodology behind it.
This tool is built on a 10-step boolean methodology drawn from 20 years of recruitment. Every step is applied automatically. Here's what happens under the hood:
Title expansion
All relevant job-title variants, including abbreviations and Dutch/English equivalents.
Sector filtering
Industry-specific terms that narrow your search to the right market.
Skill mapping
Skills and tools from the vacancy, translated into LinkedIn search terms.
Seniority scoping
Seniority, scope, and responsibility as a search filter.
Umbrella-term check
Broad terms that pull in too much noise are split or replaced.
Containment check
Terms that contain other terms (“sales” inside “salesforce”) are caught and handled.
Modifier multiplication
Qualifiers (senior, lead, head of) are systematically combined with titles.
Noise-term filtering
Terms guaranteed to produce noise are removed deterministically. No AI guessing.
Platform optimization
String length and operator usage tuned to LinkedIn's limits.
Per-category output
Six separate booleans instead of one unreadable mega-string.
This isn't AI guessing once. It's a system that enforces every step. Every time.
From vacancy to boolean in 60 seconds.
Mode A — “I know what I'm looking for”
Fill in four fields: job title, sector, seniority, exclusions. The AI generates boolean strings per category.
You have a clear profile in mind. You want a string fast without building it manually.
Mode B — “Start with the job description”
Paste your vacancy text and the tool automatically extracts titles, skills, sector terms, vendor names, and qualifiers. You get six categories of boolean strings without filling anything in.
You have a vacancy. You don't want to miss anything. The AI finds terms you wouldn't have thought of.
What you get: 6 categories
No mega-string. Six separate booleans you combine the way you want.
Job titles
All relevant title variants, synonyms, and abbreviations.
Sector
Industry-specific terms that focus your search.
Skills
Skills, tools, and certifications from the vacancy.
Seniority
Seniority and responsibility level.
Employment type
Permanent, interim, freelance, contracted.
Exclusions
Terms that attract noise, filtered automatically.
Per category: toggle chips on/off, regenerate, copy. Combine categories with AND/OR/NOT. Live preview of your final boolean with character count and platform advice.
Ready to generate your first boolean?
Paste your job description, get six boolean strings. Free.
Start free — create an accountWhat you get versus what you're used to.
| Writing it yourself | ChatGPT | Other builders | LinkedIn Search Builder | |
|---|---|---|---|---|
| Terms you don't know | Missed | Associative (unreliable) | Missed | Systematically generated |
| Containment check | No | No | No | Automatic |
| Noise-term filtering | Manual | Inconsistent | No | Deterministic |
| Umbrella-term detection | No | No | No | Automatic |
| Vacancy text as input | No | Yes (without methodology) | No | Yes (with methodology) |
| Per-category output | No | No | Sometimes | Always (6 categories) |
Writing it yourself
- Terms you don't know Missed
- Containment check No
- Noise-term filtering Manual
- Umbrella-term detection No
- Vacancy text as input No
- Per-category output No
ChatGPT
- Terms you don't know Associative (unreliable)
- Containment check No
- Noise-term filtering Inconsistent
- Umbrella-term detection No
- Vacancy text as input Yes (without methodology)
- Per-category output No
Other builders
- Terms you don't know Missed
- Containment check No
- Noise-term filtering No
- Umbrella-term detection No
- Vacancy text as input No
- Per-category output Sometimes
LinkedIn Search Builder
- Terms you don't know Systematically generated
- Containment check Automatic
- Noise-term filtering Deterministic
- Umbrella-term detection Automatic
- Vacancy text as input Yes (with methodology)
- Per-category output Always (6 categories)
For every recruiter who runs boolean searches.
Solo recruiters
New assignment, unfamiliar sector. You miss terms you don't know. Mode B extracts what you wouldn't have thought of.
Corporate recruiters
15 vacancies at once, 6 domains. You can't write the perfect boolean for every role. Now you can.
Agency recruiters
Your junior writes booleans on instinct. Your senior on experience. This tool gives everyone the same methodology.
Sourcers
Volume searches with hundreds of results. Every missed term is a missed candidate. Noise that costs you time.
Frequently asked questions
Is it really free?
Yes. LinkedIn Search Builder is free with a SourceLens account. 20 searches per day. No credit card. No time limit.
Do I need a SourceLens subscription?
No. Create a free account and you have access right away. No trial that expires.
Does it work for non-sales roles?
Yes. The methodology works for any role: IT, finance, operations, marketing, HR. The AI adapts based on your vacancy text or input.
Why six separate booleans instead of one?
One mega-string is unreadable and impossible to debug. If your search doesn't work, you don't know which part is the problem. Six categories give you control. Combine what you want. Drop what doesn't fit. Adjust per category.
Better booleans. Free. Now.
Paste your job description. Get six boolean strings based on a proven methodology. Done in 60 seconds.
Start free — create an accountFree·No credit card·No time limit