Coming soon
Combine multiple CSV files into a single import-ready file.
Upload several CSVs, line up the columns automatically, and merge everything into one file — right in your browser.
Auto-align columns — Headers are matched across files so rows end up in the right columns, even if the column order differs.
Spot mismatches early — Get a warning when files have columns that don't exist in the others, so you can decide what to keep or drop.
Undo a batch split — If you previously split a large file into parts, merge them back into one whenever you need the full dataset.
CSV Merge — Free Online Browser-Based Tool
Upload several CSVs, line up the columns automatically, and merge them into a single file. Great for joining batch exports back together. FixMyImport runs 100% client-side in your web browser, ensuring zero data retention and maximum security.
What is the CSV Merge and How Does it Work?
The FixMyImport CSV Merge is designed to streamline your digital workflows without requiring any software installation or cloud accounts.
Unlike legacy tools that send your inputs across the internet, all transformations and computations happen directly on your local device CPU. Your private data remains strictly confidential and never leaves your computer.
How It Works Under the Hood
- Instant In-Browser Execution: Employs modern JavaScript and Web APIs for zero-latency processing.
- Zero Telemetry & Logging: Inputs are kept in transient memory and wiped immediately when closed.
- Universal Cross-Platform: Works across Chrome, Safari, Edge, Firefox, Android, and iOS.
How to Use the CSV Merge in 3 Simple Steps
1. Input Your Data — Type, paste, or upload your source content into the interactive workspace.
2. Configure Options & Preview — Fine-tune settings and view instant, real-time results directly on your screen.
3. Copy or Download — Copy the formatted result to your clipboard or download clean export files.
Key Features & Advantages
100% Client-Side Privacy — Zero uploads or server storage. Your data never leaves your device.
Lightning Fast Performance — Instant processing with zero network roundtrip latency.
No Signup Required — Completely free to use without account creation, credit cards, or watermarks.
Works Fully Offline — Load the tool once, and use it anytime even without active internet access.
CSV Merge Quick Reference & Specs
| Specification | Value / Details |
|---|---|
| Processing Mode | 100% Local (Client-Side in Browser) |
| Data Retention | 0% (Never saved, logged, or uploaded) |
| Installation | None required (Instant web app) |
| Supported Platforms | macOS, Windows, Linux, Android, iOS |
| Pricing | Free for personal and commercial usage |
Why Local Processing Matters
In an era of ubiquitous data harvesting, uploading sensitive business records or development tokens to arbitrary web utilities presents major security risks.
FixMyImport guarantees zero server uploads by executing the entire toolchain directly on your device. Your work remains completely private.
Frequently Asked Questions
Is the CSV Merge free to use?
Yes, all tools on FixMyImport are 100% free with no hidden paywalls, limits, or user registration requirements.
Is my data uploaded or stored anywhere?
No. All computations take place locally inside your web browser. No files, text, or tokens are ever sent to external servers.
Can I use this tool on mobile phones?
Yes. FixMyImport is fully responsive and optimized for touchscreens on iOS (iPhone/iPad) and Android smartphones.