9 Best CSV Editors for Mac in 2026 (Free & Tested)

Numbers comes pre-installed on every Mac. It works well for spreadsheets but can modify CSV data automatically. ZIP codes may lose leading zeros. Phone numbers can turn into scientific notation. Dates get auto-converted.

LibreOffice Calc is a better option for CSV files. It's free and shows an import dialog before loading data. You set column types and choose delimiters. Your data stays as it appears in the file.

Modern CSV is a native Mac app built for CSV work. Column-based editing and regex search. TableTool is ultra-lightweight for quick inspection without editing.

This guide covers nine CSV editors for Mac with free tools, native apps, and options that handle large files without automatic data conversion.

The 9 Best Free CSV Editors for Mac in 2026

1. LibreOffice Calc

The most capable free option. Covers everything Excel does without the data corruption problem.

Install on Mac:

brew install --cask libreoffice

Or download from libreoffice.org.

What you get:

• Import dialog that appears before data loads (choose delimiter, set encoding, assign column types)
• Mark columns as "Text" to prevent conversion of zip codes, phone numbers, product IDs
• Full spreadsheet environment: sorting, filtering, formulas, conditional formatting, pivot tables
• Handles several hundred thousand rows without major slowdowns
• Native macOS app (not Electron)
• Export to CSV, Excel, PDF, and other formats

What you don't get:

• Speed of lightweight CSV editors (takes 3-5 seconds to launch)
• Performance on files over 1 million rows (starts to slow down)
• Mac-native look and feel (interface is cross-platform, not macOS-specific)

The import dialog is what makes LibreOffice better than Numbers or Excel for CSV work. When you open a CSV file, LibreOffice shows you a preview and lets you set column types before loading. Numbers and Excel open files directly and make type conversion decisions without asking.

LibreOffice Calc uses 150-200MB of RAM at idle. That's heavier than dedicated CSV editors, but if you need spreadsheet features (formulas, pivot tables, charts), it's the best free option.

Download: Download LibreOffice Calc Free and open source

2. Modern CSV

Mac-native CSV editor with clean interface and excellent large file handling.

Install on Mac:

Download from moderncsv.com. Native macOS app.

What you get:

• Clean, minimal interface that feels native on Mac
• Table view with click-to-edit cells
• Multi-cell selection and column dragging
• Stays responsive with millions of rows
• Read-only mode for safe inspection without accidental edits
• Fast search across entire file
• Duplicate row detection
• Column statistics (count, sum, average, min, max)
• Handles 2 million+ rows without noticeable lag

What you don't get:

• Regex find/replace (paid version only)
• Multi-file editing (paid version only)
• Spreadsheet formulas or pivot tables

I tested Modern CSV with a 2 million row database export. It opened in about 3 seconds and scrolling stayed smooth. LibreOffice Calc took 15 seconds to open the same file and scrolling had noticeable lag.

Free version covers core features most people need: opening, viewing, editing, and saving CSV files. Paid version ($40 one-time) adds regex search and multi-file editing.

Download: Download Modern CSV Free version available, native macOS app

3. TableTool

macOS Quick Look plugin that lets you preview CSV files right from Finder without opening any application.

Install on Mac:

Download from GitHub releases. Install the Quick Look plugin.

What you get:

• Preview CSV files by selecting them in Finder and pressing Space
• Nicely formatted table view in Quick Look window
• Columns properly aligned, scrollable data
• Works with CSV, TSV, and other delimited formats
• Automatic delimiter detection
• Handles different encodings (UTF-8, Windows-1252, etc.)
• Fast rendering even for files with tens of thousands of rows

What you don't get:

• Editing capability (viewer only, cannot modify data or save changes)
• Advanced features (no sorting, filtering, or find/replace)

TableTool changes how you work with CSV files on Mac. Instead of opening LibreOffice or another app every time you want to check contents, just select the file and press Space. The preview shows up instantly.

This is a complement to your main CSV editor, not a replacement. Use it for quick inspection, use LibreOffice or Modern CSV for editing.

Download: Download TableTool Free and open source

CSV Editor Comparison Table

4. Visual Studio Code with Rainbow CSV

If you're a developer on Mac, you probably already have VS Code installed. With Rainbow CSV extension, it becomes a capable CSV editor.

Install on Mac:

brew install --cask visual-studio-code

Or download from code.visualstudio.com.

Then install Rainbow CSV: Press Cmd + Shift + X, search "Rainbow CSV", install.

What you get:

• Color-coded columns (each column gets a different color for easier tracking)
• RBQL (Rainbow Query Language) for running SQL-like queries directly on CSV data
• Column alignment and column number display on hover
• Convert between different delimiter formats (CSV to TSV, etc.)
• VS Code's multi-cursor editing for batch changes
• Powerful search/replace with regex
• Integrated terminal for running command-line tools

What you don't get:

• Visual table view (you're working with raw text, not a spreadsheet)
• Click-to-edit cells (you edit text directly)
• Sorting or filtering by column (unless you use RBQL queries)

Rainbow CSV adds column awareness to VS Code's text editing. Each column gets a different background color, making it easy to visually track columns even in raw text view.

The RBQL feature is powerful. You can run queries like SELECT a1, a3 WHERE a2 > 100 directly on your CSV without importing it into a database.

For visual browsing and cell-by-cell editing, a dedicated CSV tool is more comfortable. But for quick edits and data exploration, especially for developers who live in VS Code anyway, this is an excellent option that doesn't require installing another app.

Download: Download VS Code Free, then install Rainbow CSV from Extensions marketplace

5. Google Sheets (Browser-Based)

Browser-based spreadsheet with reasonable CSV handling. Works the same on Mac as any other platform.

What you get:

• Direct CSV import (drag file into Google Drive or import into new sheet)
• Full spreadsheet toolkit: sorting, filtering, formulas, conditional formatting, pivot tables
• Collaboration features: share sheets, edit simultaneously, leave comments, track change history
• Automatic saving (no risk of losing work)
• Access from any computer with a browser

What you don't get:

• Import dialog to control column types (auto-converts data like Numbers)
• Offline access (requires internet connection)
• Performance on large files (cell limit around 10 million, slow uploads)
• Privacy for sensitive data (uploads to Google's servers)

Collaboration features are genuinely excellent. Share a sheet with colleagues and edit simultaneously, leave comments on specific cells, and track change history. For teams cleaning up or reviewing CSV data together, nothing else on this list comes close.

The auto-conversion problem is similar to Numbers. Google Sheets will convert 00501 to 501, turn long numbers into scientific notation, and convert date-looking strings to dates. There's no import dialog to prevent this.

For collaborative data work on moderate-sized files, Google Sheets is hard to beat. Just be aware of auto-formatting quirks and data privacy considerations.

Check it out: Try Google Sheets Free with Google account

6. Sublime Text with Advanced CSV

Sublime Text is one of the fastest code editors available on Mac. With Advanced CSV package, it becomes a capable CSV tool.

Install on Mac:

brew install --cask sublime-text

Or download from sublimetext.com.

Then install Advanced CSV: Cmd + Shift + P → "Install Package Control" → Cmd + Shift + P → "Package Control: Install Package" → search "Advanced CSV".

What you get:

• Column highlighting and alignment
• Sorting and filtering by column
• Ability to restructure CSV data (add/remove columns, reorder)
• Sublime's legendary speed (opens large files almost instantly)
• Multi-cursor editing for batch changes
• Powerful search/replace with regex
• Handles 100MB+ files without freezing

What you don't get:

• Visual table view (working in text view, not spreadsheet)
• Click-to-edit cells (you edit text directly)
• Spreadsheet formulas or pivot tables

Multi-cursor feature is especially powerful for CSV files. Need to add a prefix to every value in a column? Select the first instance, hit Cmd + D repeatedly to select all matching instances, and type your change once. It applies simultaneously to every selected occurrence.

Sublime Text is free to use with occasional purchase prompts. The $99 license (one-time, no subscription) removes the prompts. Advanced CSV package is free.

For people who prefer visual, click-and-edit table interactions, a dedicated CSV tool will feel more natural. But for keyboard-driven editing, Sublime Text is incredibly efficient.

Download: Download Sublime Text Free version with occasional purchase prompts

7. Easy CSV Editor

Native macOS app designed specifically for editing CSV and TSV files. Interface feels right at home on Mac.

What you get:

• Clean, modern design following Apple's design guidelines
• Table view with sortable columns and inline editing
• Add or remove rows and columns
• Handles different delimiters and encoding settings
• Preserves data types without unexpected conversions
• Fast search with filter mode (shows only matching rows)
• Document comparison tool (highlight differences between two CSV files)
• Lightweight and fast (opens quickly, minimal system resources)

What you don't get:

• Performance on very large files (over 1 million rows)
• Spreadsheet formulas or pivot tables
• Full features in free version (comparison tools require paid version)

The document comparison tool is useful. If you have two versions of a CSV file and want to see what changed between them, Easy CSV Editor can highlight the differences. Helpful when debugging data pipeline issues or verifying an export matches expectations.

Available on Mac App Store. Free version with basic features, paid version unlocks the full feature set including comparison tools and advanced editing options.

Download: Download Easy CSV Editor Free version on Mac App Store

8. Tad Viewer

Open-source desktop application for viewing and analyzing large tabular data files, including CSV, Parquet, and SQLite databases.

Install on Mac:

Download from tadviewer.com. Native macOS app.

What you get:

• Clean table view with fast scrolling
• Column sorting and filtering
• Summary statistics for columns (counts, sums, averages)
• Cross-tabulations for quick data exploration
• Handles multi-gigabyte files that crash other tools
• Built on DuckDB (can work with files larger than available RAM)

What you don't get:

• Editing capability (primarily a viewer and analyzer)
• Spreadsheet formulas or pivot tables

What makes Tad special is handling of large files. Because it uses DuckDB under the hood, it can work with files far larger than what fits in memory. I've used it to browse a 3 GB CSV export that crashed LibreOffice and Modern CSV. Tad opened it in about 5 seconds.

Tad is primarily a viewer and analyzer. You can explore and filter data, but editing capabilities are limited. Best used as a complement to an editor rather than a replacement. Open a file in Tad to understand the data, then switch to Modern CSV or LibreOffice to make changes.

Download: Download Tad Viewer Free and open source

9. Ron's CSV Editor

Cross-platform CSV editor available for Mac. Good for large files with clean grid interface.

Install on Mac:

Download from ronsplace.eu. Available as macOS app.

What you get:

• Table-based grid with column sorting and filtering
• Add, delete, and reorder columns
• Insert or remove rows without formula dependencies
• Find and replace across entire file or specific columns (regex support)
• Duplicate row detection and removal
• Whitespace trimming and text case conversion
• Automatic delimiter detection (commas, tabs, semicolons, pipes, custom)
• Encoding selection (UTF-8, Windows-1252, UTF-16) with preview
• Handles 100,000+ rows efficiently
• Portable version can run without installation

What you don't get:

• Mac-native look and feel (cross-platform interface)
• Spreadsheet formulas or pivot tables

Ron's CSV Editor is a solid cross-platform option. It doesn't feel as native on Mac as Modern CSV or Easy CSV Editor, but it's completely free and handles large files well.

Download: Download Ron's CSV Editor Free version available

Which CSV Editor Should You Actually Use?

If you need spreadsheet features (formulas, pivot tables, charts), use LibreOffice Calc. The import dialog prevents data corruption and it's completely free.

If you just need to edit CSV files without spreadsheet features, use Modern CSV. It's Mac-native, fast, and handles large files well. The free version covers most needs.

If you're a developer who lives in VS Code, add the Rainbow CSV extension. It gives you column awareness and SQL-like queries without leaving your editor.

If you want instant preview without opening an app, install TableTool. Select any CSV file in Finder, press Space, and see the data formatted in Quick Look.

If you're working with files over 1 million rows, use Tad Viewer or Modern CSV. Both handle massive files efficiently. Tad can open multi-gigabyte files that crash other tools.

Frequently Asked Questions

Does Mac Numbers handle CSV files properly?

No. Numbers auto-formats data aggressively without giving you control. Long numbers become scientific notation, strings that look like dates become dates, and leading zeros disappear (00501 becomes 501). There's no import dialog to override these decisions like LibreOffice has. Use Numbers only for simple files where data types don't matter.

What's the best free CSV editor for Mac?

LibreOffice Calc for full spreadsheet functionality with proper CSV import controls. Modern CSV for dedicated CSV editing with clean Mac-native interface. Both are completely free. LibreOffice is open source, Modern CSV has a generous free tier.

Can I open large CSV files on Mac without them freezing?

Yes. Use Modern CSV or Tad Viewer for files over 1 million rows. Both handle massive files efficiently. Tad can work with multi-gigabyte files that would crash most other tools. Avoid Numbers for large files - it has poor performance with large datasets and will likely freeze or crash.

How do I stop Mac from converting CSV data when I open it?

Don't double-click CSV files (opens in Numbers by default, which auto-converts data). Instead, open LibreOffice Calc, use File → Open, select your CSV, and in the import dialog, set column type to "Text" for columns needing exact preservation. Or use a dedicated CSV editor like Modern CSV which treats all data as text by default.

Is LibreOffice good for CSV editing on Mac?

Yes, it's one of the best free options. The import dialog gives you full control over delimiters, encoding, and column types before loading data. This prevents the silent data corruption that happens in Numbers and Excel. It's open source, completely free, and handles hundreds of thousands of rows well. The interface isn't Mac-native, but the functionality is solid.

Can I preview CSV files on Mac without opening an app?

Yes. Install TableTool, a Quick Look plugin for CSV files. After installation, select any CSV file in Finder and press Space. The file appears in a formatted table view in the Quick Look window. You can scroll through the data without opening any application. TableTool is free and open source.

Using Windows? See our guide to the best CSV editors for Windows for Windows-specific options.

Related guides:

• How to Merge Excel Files for spreadsheet consolidation
• Best JSON Editor for Mac for JSON editing tools on macOS
• CSV Merger for combining multiple CSV files into one \