How to Download and Upload Your 23andMe Raw DNA Data

If you have tested with 23andMe, you own your genetic data — and you have the right to download it. That raw data file is far more powerful than the reports 23andMe shows you on its website. By uploading it to specialized tools like ChatDys, you can cross-reference your SNPs against the latest research on dysautonomia, POTS, MCAS, EDS, and related conditions, giving you a personalized genetic lens that no single testing company provides.

This guide walks you through exactly what your raw data file contains, how to download it, and how to upload it to ChatDys for analysis.

What Is 23andMe Raw Data?

When 23andMe tests your saliva sample, it uses a technology called SNP genotyping — a microarray chip that reads roughly 600,000 to 700,000 specific positions across your genome. These positions are called single nucleotide polymorphisms (SNPs), each identified by a unique reference number called an rsID (e.g., rs4680).

Your raw data file is a plain-text, tab-separated file that contains every SNP 23andMe measured. It is not a health report — it is the underlying data from which reports are generated. Think of it as the original photograph before any editing or cropping.

What the File Looks Like

The file is typically named something like:

genome_FirstName_LastName_v5_Full_YYYYMMDD.txt

genome_FirstName_LastName_v5_Full_YYYYMMDD.txt

It is delivered as a .zip archive. When unzipped, you will find a .txt file with the following structure:

The file begins with several comment lines starting with # that describe the genome build used (typically GRCh37/hg19, also called Build 37), the date of download, and the 23andMe software version. These lines are metadata and are automatically skipped by analysis tools.

A typical excerpt looks like this:

# This data file generated by 23andMe at: Mon Apr 01 12:00:00 2024
# Build: 37
# Format: v5
#
# rsid	chromosome	position	genotype
rs4477212	1	82154	AA
rs3094315	1	752566	AG
rs3131972	1	752721	AG

# This data file generated by 23andMe at: Mon Apr 01 12:00:00 2024
# Build: 37
# Format: v5
#
# rsid	chromosome	position	genotype
rs4477212	1	82154	AA
rs3094315	1	752566	AG
rs3131972	1	752721	AG

The genotype column shows two letters representing the two copies of your DNA at that location — one inherited from each parent. A genotype of AG means you have one copy of adenine (A) and one copy of guanine (G) at that SNP.

What the Data Does and Does Not Tell You

It is important to understand what raw SNP data represents. Each SNP is a single-letter variation in your DNA at a specific position. Research studies (called GWAS — Genome-Wide Association Studies) have linked certain SNPs to increased or decreased risk for various conditions. However, raw data alone is not a diagnosis. It shows your genetic variants; it does not tell you whether a gene is expressed, how your environment modifies it, or whether you will develop any condition. Analysis tools like ChatDys use this data to surface relevant research and flag variants that have been studied in the context of your conditions — always for informational purposes only.

How to Download Your 23andMe Raw Data

The download process takes only a few minutes, though 23andMe may require up to 24 hours to prepare the file before it is available.

Step 1: Log In to Your Account

Go to 23andme.com and sign in with your username and password.

Step 2: Navigate to Account Settings

Click on your name or profile icon in the upper-right corner of the page. From the dropdown menu, select Settings.

Step 3: Find the Raw Data Download Section

Scroll down the Settings page until you see the section titled "Download your data" (it may also appear as "23andMe Data" depending on your account version). Click the "View" button next to it.

Step 4: Request Your Download

You will see a list of data types available for download. Locate "Browse Raw Data" or "Genome" and click "Download" next to it. 23andMe will ask you to confirm your identity by re-entering your password or completing a two-factor authentication step.

After confirming, 23andMe will begin preparing your file. You will receive an email notification when the file is ready — this typically takes anywhere from a few minutes to 24 hours depending on server load.

Step 5: Download the File

When you receive the email, click the link inside it to return to the download page. Click "Confirm Data Download" and then "Download". The file will save to your computer as a .zip archive.

Important: Do not share this file publicly or upload it to any service you do not trust. Your raw genetic data is uniquely identifying and highly sensitive.

Step 6: Unzip the File (Optional)

Most analysis tools, including ChatDys, accept the .zip file directly — you do not need to unzip it. If you do need the raw .txt file, you can extract it by double-clicking the .zip on Mac or right-clicking and selecting "Extract All" on Windows.

Understanding Your File Before Uploading

Before uploading, it helps to know which version of the 23andMe chip your data was generated on. 23andMe has released several chip versions over the years, each covering a different set of SNPs:

You can find your chip version in the # comment lines at the top of your raw data file. Most modern analysis tools work with all versions, but v5 is the most commonly supported.

How to Upload to ChatDys

Once you have your file, uploading to ChatDys takes under a minute.

1. Navigate to the Genetics section in the ChatDys sidebar.
2. Click the "Upload Raw DNA" tab.
3. Click "Choose File" and select your .zip or .txt file from your computer.
4. Click "Upload & Analyze".

ChatDys will parse your file, extract your SNPs, and cross-reference them against a curated database of variants relevant to dysautonomia, POTS, MCAS, EDS, Fibromyalgia, Long COVID, and related conditions. Results appear in the "My Variants" tab, organized by condition and evidence level.

What Happens to Your Data

Your raw DNA file is processed on secure servers and the results are stored in your private account. Your raw file is not retained after processing — only the parsed variant results are saved. You can delete your genetic data at any time from your account settings.

Frequently Asked Questions

Can I re-download my data if I lose the file? Yes. You can return to 23andMe Settings and request a new download at any time, as long as your account is active.

My file is very large — is that normal? Yes. A typical 23andMe raw data file is between 5 MB and 25 MB compressed. Unzipped, the .txt file can be 30–60 MB. This is expected.

What if my download link has expired? 23andMe download links expire after a short period. Simply return to Settings and request a new download.

Will uploading my data affect my 23andMe account? No. Downloading and uploading your raw data to third-party tools has no effect on your 23andMe account, reports, or DNA matches.

Is my data safe with ChatDys? ChatDys processes your file locally and stores only the parsed variant results — not your raw file. All data is encrypted and tied to your account. See the ChatDys Privacy Policy for full details.

This article is for informational purposes only. Raw genetic data is not a medical test and should not be used for diagnosis or treatment decisions. Always consult a qualified healthcare provider or genetic counselor for medical guidance.