Bounded pages
Keep only the visible 50–1,000 rows in the WebView. Jump to source offsets without rebuilding the file.
LOCAL-FIRST DATA ENGINEERING
Read large data files
without uploading them.
A fast Windows and macOS workspace for inspecting, filtering, sorting, checking and safely editing your own CSV, JSONL, Parquet, SQLite and DuckDB files.
Preview is free forever · no credit card · no cloud data workspace
15 GB+large local files
Rustbounded memory engine
0 uploadsby default
MCPlocal automation in Pro
WHY IT EXISTS
Your files stay where your work is.
Web viewers often turn a data file into a browser problem. RowCove keeps parsing, indexing, querying and source-row recovery in the desktop Rust engine. The web page sells the software; it never becomes your data pipeline.
Read the privacy boundary →workspace / localsource results_2026.csv size 15.02 GiB mode mmap + column cache ✓ original stays untouched ✓ source offset preserved
Columnar queries
Pro uses persistent DuckDB or Parquet caches for projection, filters and stable sorting while CSV remains the evidence source.
Safe edits
Stage changes, keep a recovery journal and write a new copy. The original file is never silently replaced.
SIMPLE PLANS
Start by checking your own file.
One product, two clear modes. Tax, billing and refunds are handled by the selected Merchant of Record when production checkout is enabled.
$0
forever
- Open local supported files
- Summary, schema and first 100 rows
- No account or credit card
- Read-only
$14 / month
or $140 / year
- Filters, sorting and pagination
- Quality checks and schema diff
- Charts, source recovery and safe export
- Built-in local MCP tools
Renews automatically. Cancel renewal in billing. Applicable tax is shown at checkout.
DESKTOP RELEASES
Download the app and open a file.
Windows builds are available for testing. macOS release validation is pending. Production downloads will include release notes and SHA-256 checksums. Preview does not expire.