Merge CSV Files in Seconds — Free CSV Merger, No Login

1Select files

→

2Merge rows

→

3Download

Select Files Files never leave your browser

📂

Drag & drop your CSV or TSV files here

or click anywhere to browse

.csv · .tsv · Multiple files

ℹ️ Files merge top-to-bottom. The first file sets the column order — subsequent files append into matching columns.

Advanced Options

Duplicate Row Handling

Missing Columns

Output Format

Output Filename

.csv

Merging your files…

Done! Your download has started.

Free CSV Merger to Combine CSV & TSV Files Online

Merge CSV files quickly with this free CSV merger. Upload multiple CSV or TSV files and combine them into a single file, row by row. Headers are matched automatically, and missing columns are handled for you. Works entirely in your browser—no login, no uploads, and complete privacy. Merge multiple CSV files into one file instantly. This tool helps you combine CSV files online without Excel or any additional software.

✅ Works with .csv & .tsv 🔒 100% Private — Runs Locally 📂 Merge Multiple Files Instantly 🔀 Columns Matched by Header 📋 Mix CSV & TSV Files Freely 🧹 Duplicate Row Handling

What is a CSV Merger?

A CSV merger is a tool that helps you merge CSV files into a single file without manual copying. Instead of handling data line by line, you can combine multiple CSV files instantly while keeping rows and columns aligned. Easily combine CSV files into one organized dataset without losing any data.

This CSV combiner works directly in your browser, so your data stays private and secure. It's ideal for marketers, analysts, and anyone working with large datasets.

How to Merge CSV Files Online

Upload your CSV files, arrange them in order, and click merge. This CSV merger will combine all files into one while keeping your data structured and aligned. It works directly in your browser, so you don't need Excel or any additional software.

Can I merge CSV files without Excel?

Yes, you can merge CSV files online without Excel using this CSV merger. Simply upload your files and combine them instantly in your browser.

About This Tool

CSV Merger Tool – Merge CSV Files Without Any Software

This tool is part of ToolTab — a free collection of utilities built for marketers, PPC managers, and data workers. No installs, no accounts, no data sent to any server.

Have a suggestion or found a bug? We'd love to hear from you.

How It Works

📂 Upload your files

Drop multiple .csv or .tsv files. Mix formats freely — the tool auto-detects delimiters. The first file sets the column order.

🔀 Columns are matched by header name

Rows are appended in order. If a later file has extra columns, they're added to the output. Missing values are left blank.

⬇ Download the result

Your merged file is generated in the browser and downloaded directly — nothing is sent to a server.