CSV at any scale.
Open files that break everything else.
Open multi-gigabyte files in seconds. Inspect, search, and navigate 300M+ rows with smooth scrolling and modest memory usage — on Apple Silicon.
Built for viewing, not editing
Most CSV tools are built like spreadsheets. CSView is optimised for a single job: opening enormous files quickly and letting you explore them safely.
Instant startup, massive files
Background indexing means you can inspect the first rows of a 27 GB file the moment it opens, while the rest loads silently.
Smooth scrolling at any scale
Consistent, responsive scrolling through hundreds of millions of rows. Modest memory usage even with massive files.
Full-file text search
Search across the entire file with match counting and instant result navigation. Results appear as the background pass completes.
Flexible format support
CSV, TSV, custom delimiters, multiple encodings (UTF-8, Windows code pages, ISO Latin, macOS Roman), and auto-detection.
Read-only by design
CSView never modifies your source data. Inspect exports, logs, and datasets safely without risk of accidental changes.
Copy as Markdown tables
Select cells and copy as rich text or plain-text Markdown-compatible tables — ready to paste into docs, issues, or notes.
See what CSView can do
300 million rows. No problem.
A 27 GB synthetic dataset with over 300M rows — opened and scrollable within seconds of launch. Background indexing handles the rest.
Pinch to zoom, drag to resize
Zoom from 0.25× to 4×, resize columns with a drag, or double-click a header to autosize. Row numbers and column headers are always visible.
Configure any delimiter or encoding
Set custom delimiters, line endings, quote characters, and text encodings. Auto-detection handles the common cases — live preview shows changes before you commit.
Choose the right version
CSView 2 is a ground-up macOS rewrite. CSView 1.x is the original cross-platform release — still maintained and available for free.
CSView 2.x
- ✓ Ground-up native macOS rewrite
- ✓ Apple Silicon optimised
- ✓ New high-performance indexing engine
- ✓ Handles 300M+ row files
- ✓ No subscription — £1.99 one-time
CSView 1.x
- ✓ macOS, Windows, and Linux
- ✓ Free and open source
- ✓ Viewing, search, and navigation
- ✗ No App Store — direct download only
- ✗ No new feature development
CSView 1.x Downloads
Direct downloads — no App Store required. Older versions
Available now on the Mac App Store
CSView 2 is a one-time purchase. No subscriptions, no cloud, no telemetry — just a fast, native macOS app.
£1.99 · macOS 12+ · Apple Silicon & Intel