Free browser-only raw DNA preflight
Free raw DNA file checker before you upload.
Not sure whether you downloaded the right file from 23andMe, AncestryDNA, or MyHeritage? Drop it into this local checker to spot obvious format problems before creating a report.
Want to see the output first? Use the synthetic example result.
This checker is a format preflight, not a medical interpretation. It does not validate clinical accuracy, diagnose conditions, or send your genotype data to GenoSight.
How to check a raw DNA file
The fastest path is to confirm the file shape locally, then use GenoSight only when the file looks like a real genotype export.
Download the raw data export
Use the provider file that contains genotype rows, not a report PDF, screenshot, account export, or saved web page.
Extract the file if needed
If the provider gives you a ZIP or GZIP archive, unpack it first and choose the raw text, CSV, or TSV file inside.
Run the browser-only preflight
Drop the file into this checker. It reads the first local file in your browser and looks for raw genotype-style rows.
Move only a compatible file forward
If the result looks compatible, start with free credits. If it looks wrong, use the troubleshooting guide before uploading.
What the checker looks for
This is a quick format check for people who already have raw DNA data and want to avoid uploading the wrong file type.
Looks for genotype-style rsID rows in the file
Flags PDFs, screenshots, web pages, ZIPs, and compressed files
Estimates likely provider format from headers and delimiters
Runs locally in your browser before any GenoSight upload
Before you run a report
Raw genotype files are different from provider reports, screenshots, and dashboard exports. The right file is usually a large text file with hundreds of thousands of variant rows.
Use the raw data export
Choose the plain text, CSV, or TSV genotype file from 23andMe, AncestryDNA, or MyHeritage. Do not use a downloaded report PDF.
Unzip provider downloads first
Some providers package raw data in a ZIP archive. Extract it, then pick the raw DNA text file inside.
Treat this as a preflight
The checker can spot obvious format problems, but final report coverage still depends on the variants present in your file.
Local check first, hosted analysis only if you choose it.
The preflight checker is intentionally limited. It helps you avoid obvious mistakes, then GenoSight's consent flow handles the real upload if you decide to generate an educational report.
Compare browser-only and hosted analysisYour file stays local
Selecting a file for this page does not send genotype data to GenoSight, Stripe, analytics, or an AI model.
Upload remains optional
You only upload to GenoSight after signing in, reviewing the consent boundary, and choosing to start analysis.
Reports stay educational
GenoSight reports explain consumer raw DNA data with caveats; they are not diagnosis, screening, or treatment guidance.
Raw DNA file checker questions
Does the raw DNA file checker upload my DNA file?
No. The checker reads the selected file in your browser and shows a format preflight result before any GenoSight upload happens.
What files can it check?
It is intended for raw genotype text, CSV, or TSV files from 23andMe, AncestryDNA, and MyHeritage. It rejects obvious wrong files such as PDFs, saved web pages, ZIP archives, and GZIP archives.
Does a compatible result mean every GenoSight report will work?
No. A compatible result means the file looks like a consumer raw DNA export. Actual report usefulness depends on chip coverage, missing calls, and the specific markers needed for each report.
Is this a medical test?
No. GenoSight provides educational raw DNA reports only. This checker is a file-format preflight, not a diagnosis, clinical validation, or treatment recommendation.
250 free credits, no card