Stop losing data to auto-formatting.
The surgical CSV editor that never strips leading zeros or corrupts your values. Simple, private, and powerful.
Original
5551234567
MAR1
00123Excel
5.55E+10
01-Mar
123✕PocketCSV
5551234567
MAR1
00123✓Surgical Editing
We render raw text only. No auto-formatting. No "01-Mar" conversions. Just your data, exactly as it was saved.
Visual Grid Diff
The power of git diff for everyone. See exactly which cells changed between versions with synchronous scrolling.
Built for Scale
Open files instantly as many times as you want. No lag, no spinning wheels, and no browser crashes.
Smart Column Matching
Automatically maps headers between versions for faster and accurate comparisons.
Instant Data Profiling
Get immediate statistical summaries, including null counts, unique values, and formulaic results for any column.
Privacy First Security
All data stays local in your browser. No files are uploaded to our servers without your consent.
One-Click Validation for your Tech Stack.
Shopify
Preserves SKU formats and validates variant structure.
Facebook Ads
Checks audience list uploads for proper hashing and formatting to maximize match rates for custom audiences.
Workday
Ensures employee payroll data and tax identification numbers align with specific HRIS column schemas.
Salesforce
Checks for column alignment before you import.
QuickBooks
Cleans transaction history to prevent duplicate entries and mismatched chart of accounts during import.
Zendesk
Verifies ticket formatting and data integrity for support logs.
HubSpot
Validates contact lists and leads structure before CRM sync.
Amazon Seller Central
Validates flat-file templates to ensure product dimensions and weights match Amazon's strict requirements.
Simple, Transparent Pricing.
Free
$0one-time
- ✓ Unlimited Viewing
- ✓ Manual Editing
- ✓ Basic Data Rules and Formatting Options
- ✓ Files up to 10MB
Pro License
$10one-time
- ✓ Everything in Free
- ✓ Visual Grid Comparison
- ✓ Magic Wand Bulk Cleaning
- ✓ Cloud Backup and File Storage
- ✓ Professional Exports
- ✓ Priority Support
- ✓ Files up to 500MB
Frequently Asked Questions
What exactly is PocketCSV?
PocketCSV is a browser-based, privacy-first utility designed for the "surgical" editing and comparison of data files. Unlike Excel or Google Sheets, it renders raw text only, ensuring your data is never auto-formatted, corrupted, or stripped of leading zeros.
How does PocketCSV protect my privacy?
Our architecture is entirely client-side. This means your files are processed directly in your browser and are never uploaded to our servers. Your data stays on your machine.
Why shouldn't I just use Excel or Google Sheets?
Excel often "silently" corrupts data. It frequently strips leading zeros from zip codes (00123 becomes 123), converts gene symbols or part numbers into dates (MAR1 becomes March 1st), and turns long numbers into scientific notation. PocketCSV preserves every character exactly as it appears in the raw file.
What is the "Visual Grid Diff"?
It is a side-by-side comparison tool that scrolls in sync. It highlights specific cell changes, added rows, and deleted rows, allowing you to audit differences between two files without writing complex VLOOKUP or Python scripts.
Does it handle large files?
Yes. While traditional spreadsheet software often lags or crashes with large datasets, PocketCSV is optimized to handle extra large files with high performance.
What are "Pre-Flight" validation modules?
These are specialized check-lists designed for specific platforms like Shopify, Salesforce, or FinTech apps. They scan your CSV before you import it to ensure columns, formats, and data types match the target system’s requirements.
Can I use it on a Mac or Linux?
Since PocketCSV is browser-based, it works on any operating system with a modern web browser (Chrome, Firefox, Safari, or Edge) without the need for installation.
Is there a way to undo my changes?
Yes! PocketCSV tracks your editing history, allowing you to revert edits or bulk cleaning actions before you save your final file.
How do I get my Pro License?
You can upgrade directly within the app. Once the one-time payment is processed, your Pro features are instantly unlocked on your current browser.