Free data tools / No signup
A cleaner list starts here.
Remove duplicate rows, trim whitespace and normalize email addresses and company domains. Preview the result, keep a review report, and download your cleaned CSV.
Your CSV stays in this browser tab. File contents are not uploaded or saved. Up to 5 MB and 20,000 rows. This checks formatting, not whether a company exists, an email can receive mail, or a contact matches your ICP.
Comma
Keep the evidence. Clean the formatting.
The tool never fills missing facts or guesses employee counts, job titles or email addresses. Keep the source URL and observation date in your own columns: they travel with the row.
Try a reproducible example
Load the built-in sample and click Clean CSV. Four input rows become two: one duplicate and one empty row are removed. The example uses reserved .example domains and fictional people.
Prepare a HubSpot import
Clean a contact file, review identifiers and map the columns.
Follow the worked exampleClean a Google Sheets list
Export a working copy, deduplicate it and review it in a new sheet.
Follow the worked exampleNeed missing data, too?
AstroFabric can discover and enrich company and contact records with source evidence. Explore enrichment or start a 3-day trial with 200 credits.
More free tools
Free email verifier
Paste up to ten addresses and get a deliverability verdict on each, checked against the mailbox rather than guessed from the format.
Open the toolICP builder
Turn “mid-market SaaS in North America” into criteria a machine can run: size, geography, technologies, hiring, funding and disqualifiers.
Open the toolCost per usable record calculator
Enter two providers’ price per record and their matched, verified and ICP-fit counts; see the real cost of a usable record and where they cross.
Open the toolWho raised this week
Every company that announced a round in the last seven days, with the stage, the amount, the investors and the source, refreshed each Monday.
Open the tool