5 file formats
CSV, Excel (.xlsx), JSON, TXT (any delimiter), and Apache Parquet. Auto-detect encoding and separator.
Features
One app, every data file.
EchoCSV handles files that crash Excel and workflows that shouldn't require Python. Here's what's in the box.
In the box
Built for big data
Loading, querying, editing, profiling, comparing, and exporting — all at million-row speed on your own machine.
DuckDBParallelCross-platform
Open & view
Load anything, instantly.
1M rows in 2 seconds
Optimized parsing pipeline loads massive files without freezing. Scroll through millions of rows smoothly.
Multi-file tabs
Open many files at once in separate tabs. Compare side by side or query across them.
Drag & drop
Drop files onto the window to open them. No file dialogs, no friction.
Auto-detect everything
Encoding (UTF-8, Latin-1, etc.), delimiters (comma, tab, pipe, custom), and column types — handled automatically.
Bookmarks & Go To
Bookmark important rows and jump to any row number instantly.
Query
SQL on your desktop.
Embedded DuckDB
Write real SQL — SELECT, WHERE, GROUP BY, JOIN, window functions — against any open file. No database server needed.
Cross-tab joins
Join data across multiple open files in a single query. Combine CSVs like database tables.
Instant results
Query results appear in a new tab immediately. Export them or keep querying.
Edit
Fix data without scripting.
Cell editing
Click any cell and type. Full undo/redo with delta-based history.
Regex search & replace
Find and fix patterns across millions of cells with regular expression support.
Sort & filter
Stable parallel sorting on any column. Multi-column sort for complex ordering.
Find duplicates
Identify duplicate rows by any combination of columns. Flag or remove them.
Row flagging
Mark rows for review without modifying data. Filter to flagged rows anytime.
Column operations
Rename, reorder, hide, and delete columns. Reshape your data without code.
Analyze
Understand your data at a glance.
Column profiling
One-click stats: min, max, mean, median, nulls, unique count, and value distribution for every column.
Sheet comparison
Compare two files or tabs side by side. Spot differences row by row.
Data quality
See empty cells, type mismatches, and outliers highlighted automatically.
Export
Get clean data out.
Export to any format
Save results as CSV, Excel, JSON, or Parquet. Choose encoding and delimiter.
Filtered export
Export only the rows that match your current filter, query, or flagged selection.
Batch operations
Process multiple files with the same query or transformation in one pass.
Platform
Native on every OS.
Windows x64
Native build for Windows 10 and 11. Self-contained, no runtime required.
macOS ARM64
Apple Silicon native. Fast and energy-efficient on M-series Macs.
Linux x64
Self-contained Linux build. Works on any modern distro out of the box.
Light & dark themes
Respects your system preference. Easy on the eyes during long data sessions.
~70 MB package
Small download, fast install, no dependencies. Ready in seconds.
Keyboard-first
Full keyboard navigation and shortcuts for power users who live in the data.
Ready?