🚀 Now in beta

Compare CSV files.
Instantly.

Upload two CSVs and see exactly what changed — added rows, removed rows, modified cells — in seconds. AI explains it all in plain English.

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customers_q2.csv vs customers_q1.csv
3
Added
1
Removed
2
Modified
✦
AI Summary: Revenue increased for Acme Corp and Epsilon Ltd. Beta LLC's status changed to inactive, and Delta Co was removed from the dataset entirely.
Change
Name
Revenue
Status
Added
Eta Partners
$28,000
active
Removed
Delta Co
$5,000
active
Modified
Acme Corp
$45,000
$52,000
active
Modified
Beta LLC
$12,000
active
inactive
How it works

From upload to insight
in under 10 seconds

1

Upload your two CSV files

Drag and drop your original and updated files. No login required. Files never leave your browser.

2

See the diff instantly

Added, removed, and modified rows are color-coded immediately. Cell-level changes show old and new values side by side.

3

Get the AI summary

Our AI reads the changes and writes a plain-English summary of what happened — so you can share findings without writing a word.

Features

Everything you need.
Nothing you don't.

Built for data analysts and business teams who work with CSV exports every day.

🎨

Visual diff

Color-coded rows and cell-level highlights make changes impossible to miss. Green for added, red for removed, yellow for modified.

✦

AI-powered insights

Claude AI analyzes your diff and writes a 2–3 sentence plain-English summary. Perfect for sharing in Slack or a status update.

🔒

100% private

All comparison logic runs in your browser. Your CSV data is never uploaded to our servers. Zero risk of data exposure.

🔗

Shareable links

Generate a unique link to share your diff with teammates. They can view it without logging in. Great for async reviews.

📅

Scheduled diffs

Connect Google Sheets or Dropbox and set a recurring schedule. Get notified by email or Slack when changes are detected.

📥

Export results

Download the diff as a clean CSV with a _change_type column, or export a summary PDF report for stakeholders.

Use cases

Who uses CSVDiff?

📊

Data analysts

Compare weekly sales exports to find new deals, lost customers, or revenue changes without manual scanning.

💰

Finance teams

Reconcile budget vs. actuals and audit payroll or vendor payment changes between reporting periods.

📦

Operations managers

Track inventory changes between supplier reports and quickly spot discrepancies before they become problems.

📣

Marketing teams

Compare campaign performance exports between periods to identify winning and losing channels at a glance.

Pricing

Simple, transparent pricing

Start free. Upgrade when you're ready. No hidden fees.

Free
$0
Perfect for trying it out
✓ 5 diffs per month
✓ Up to 10,000 rows
✓ Visual diff
✓ 5 AI insights/month
–  Diff history
–  Shareable links
Get started free
Best value
Pro
$19 /month
For individual analysts
✓ Unlimited diffs
✓ Up to 1M rows
✓ Unlimited AI insights
✓ 90-day history
✓ Shareable links
–  Team workspace
Start free trial
Team
$49 /month
For small teams
✓ Everything in Pro
✓ 5 team seats
✓ Shared workspace
✓ Scheduled diffs
✓ Slack notifications
–  API access
Start free trial
Business
$149 /month
For larger organizations
✓ Everything in Team
✓ Unlimited seats
✓ API access
✓ SSO / SAML
✓ Audit logs
✓ Dedicated support
Contact sales

Annual billing saves 20% · 14-day free trial on all paid plans · No credit card required

FAQ

Common questions

Your CSV files are processed entirely in your browser using JavaScript. They are never uploaded to our servers. Only the AI insight feature sends a small summary of the changes (not your raw data) to generate a plain-English description.
CSVDiff currently supports CSV and TSV (tab-separated) files. Excel (.xlsx) support is coming soon. You can export from any tool — Google Sheets, Excel, Salesforce, HubSpot, etc. — and compare the CSV exports directly.
Free accounts can compare files up to 10,000 rows and 10MB each. Pro and Team plans support up to 1 million rows. Business plans have no row limit. Performance is typically under 3 seconds for 10k rows and under 30 seconds for 1M rows.
After your diff is calculated, CSVDiff sends a structured summary of the changes (column names, counts, and a sample of modified rows) to Claude AI. It returns a 2–3 sentence plain-English explanation. Your raw CSV values are not sent — only anonymized change metadata.
Yes, absolutely. You can cancel your subscription at any time from your account settings. You'll retain access until the end of your current billing period, and you'll never be charged again after cancellation.
Yes! All paid plans come with a 14-day free trial. No credit card required to start. The free tier is also available indefinitely with 5 diffs per month.

Stop wasting hours on spreadsheet detective work.

Join the waitlist and get early access to the tool that turns your most tedious weekly task into a 10-second job. See added rows, removed rows, and modified cells at a glance. Let AI write the summary for you. Share results with your team in one click.

Join the waitlist →

Free early access · No credit card required · No spam