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The Missing Header
One sharp idea each week to help you handle messy spreadsheets, weird exports, and undocumented CSVs — faster and smarter.
Written by the guy who built Tablecruncher.
See what you’ll get.

News  25th Apr, 2025: Tablecruncher goes Open Source!

Features

⚡
Open files bigger than 2GB and containing more than 15 million rows. Opening a 100MB CSV file with more than 500,000 lines takes less than 5 seconds on a dual-core Macbook Pro.
⌨
Use Javascript as a macro language to manipulate your CSV files. A simple API gives you access to all cells and you can change cell content as well as do abitrary calculations.
➟
Export your table data to JSON. The exported JSON is an array-of-objects if there's a header row present in your CSV data. Otherwise you'll get an array-of-arrays.
🗃
Automatically detects most CSV file formats and file encodings for you. If you want, you can easily override the automatic detection and choose the appropriate CSV parameters.
📄
Open and save CSV files with one of these encodings: UTF-8, UTF-16LE, UTF-16BE, Latin-1 (ISO-8859-1) and Windows 1252 files. (These list will be extended in future updates.)
🔎
Use the powerful Find and Replace dialog to search for patterns in your table or in a selected area. Regular Expressions according to the ECMAScript 5 standard are supported.
🎨
Enjoy crunching your data with four beautifully designed color themes, including a dark theme that fits well with the Mac's dark mode.
𝌘
Flag rows manually or with the Find and Replace dialog and export flagged rows as a new CSV file.
𝌅
Modify your CSV data grid easily. You can sort lines alphabetically or numerically, move columns right or left or delete columns. Or set your first CSV row as a header row.

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What others are saying

Twitter Testimonial
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Not convinced yet? Head over to the GitHub repository to check out more details.

Blog

Tablecruncher is Going Open Source — Here's Why

Apr 25, 2025

Version 1.7.0 published

Oct 18, 2024

New beta for Tablecruncher 2

May 31, 2023

A new beta version of Tablecruncher 2 is available

First early beta for Tablecruncher 2

Dec 20, 2022

A very early first beta version for the completely rewritten version 2 of Tablecruncher is available

Roadmap for Version 2

Sep 12, 2022

The completely new version 2 for Tablecruncher is due this autumn.