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Open the CSV that makesExcel freeze — instantly.open large CSV file Windows

CSVPrune renders only what's on screen and keeps the work in Rust, so you scroll, search, filter, and type-aware sort six-figure row counts with no lag, no truncation, and no 1,048,576-row wall.

CSVPrune renders only on-screen rows and works in Rust, so you scroll, search, filter, and type-aware sort six-figure CSVs with no freezing and no row-limit truncation.

$14.99 USD — Perpetual License

One-time purchase · Lifetime updates · Delivered via the Microsoft Store

Get it from Microsoft Store

Purchased and updated securely through the Microsoft Store. No account needed on our site, no subscription, and a Microsoft receipt for easy corporate expensing.

Full CSVPrune overview
One-time purchase No telemetry Local-first

windows · local-first · no telemetry · one-time purchase

If this sounds like your week

The file is too big for Excel, so it freezes, truncates, or refuses to open.

A log dump, a full customer export, an analytics extract — past a few hundred thousand rows the spreadsheet stalls on load, and beyond 1,048,576 rows it silently drops everything after the limit. You are left guessing whether you are even looking at the whole dataset.

Where tooling usually breaks

Splitting files and waiting on spinners is not a workflow.

The usual coping moves — chopping the export into pieces, waiting out a beachball, or abandoning the file for a database import — burn time and risk analyzing a partial picture. Scrolling a giant sheet that lags on every keystroke is its own punishment.

Where CSVPrune lands

A virtualized grid that stays smooth on the files that break Excel.

CSVPrune renders only the rows on screen and keeps the heavy work in Rust, so you scroll, search, filter (literal or regex), and sort six-figure row counts instantly. Sorting is numeric- and date-aware, so 9 comes before 10, and the complete row set never leaves the backend — the interface only ever receives the slice you are viewing.

$14.99 USD — Perpetual License

One-time purchase · Lifetime updates · Delivered via the Microsoft Store

Get it from Microsoft Store

Purchased and updated securely through the Microsoft Store. No account needed on our site, no subscription, and a Microsoft receipt for easy corporate expensing.

Learn more about CSVPrune

windows · local-first · no telemetry · one-time purchase

What you get

Feature highlights

Opens what Excel chokes on

scroll, search, filter, and type-aware sort 100k+ row files instantly in a virtualized grid—no 1,048,576-row wall and no freezing.

Fixes broken exports

auto-detects and overrides delimiters (comma, semicolon, tab) and encodings (UTF-8/16, Latin-1) so CRM, Shopify, and Google Forms files stop arriving garbled—and leading zeros and long IDs are never silently mangled.

Deterministic cleaning pipeline

trim, normalize emails, find/replace (literal or regex), coerce numbers, currency, dates, and booleans, dedupe by any key column, and point-and-click prune rows—composed in the order you choose.

Live formula engine

create calculated columns with real-time preview and a ghost column in the grid, using column references, arithmetic, string functions, and helpers like coalesce()—saved as replayable steps.

Clean once, replay forever

save any sequence as a named recipe, apply it in one click, batch-run it across a folder, or point a watch folder at it so every new CSV is cleaned automatically.

Private by design

every row stays in local memory, with no cloud, no telemetry, and no network calls—auditable with Wireshark. Export to CSV, JSON, or XLSX, or run an audited export with a full before/after sidecar.

Especially when

  • Clean and dedupe messy CSV exports on Windows without uploading sensitive data to a web-based CSV cleaner
  • Open, search, and sort CSV files that are too large or too slow to handle in Excel
  • Fix CSV encoding and delimiter problems (UTF-16, Latin-1, semicolon, tab) that corrupt CRM, Shopify, and Google Forms exports
  • Replay the same cleaning steps on recurring files automatically instead of repeating them by hand every week

Who benefits

Real-world scenarios

The 600k-row extract

An analytics export has well over half a million rows; Excel either refuses to open it, hangs for minutes, or silently cuts off everything past its row limit, so you can't trust what you see.

CSVPrune opens it immediately, scrolls without lag, and lets you filter and numerically sort the whole set in place, confident you are looking at every row rather than a truncated slice.

The compliance-bound team

You need to clean a file of customer names and emails, but company policy forbids uploading personal data to third-party websites, which rules out the quick online CSV cleaners.

CSVPrune does the whole job locally with no network access, so you clean and export the file without anything leaving the machine — and you can prove it with a connection monitor.

The weekly tidy-up

A partner export arrives with trailing spaces, mixed-case emails, and a few blank rows every week, and you fix the same things by hand in a spreadsheet each time before anyone can use it.

You compose the trim, email-normalize, and row-prune steps once in CSVPrune, watch the live counts confirm the changes, and save it as a recipe so next week's file is a single click.

Deep dive

Why Excel stalls on big CSVs — and how a virtualized grid stays fast

A spreadsheet loads the entire file into memory and lays out every row before it shows you anything, so a multi-hundred-thousand-row CSV means a long freeze on open, sluggish scrolling, and — past 1,048,576 rows — a hard limit where everything beyond is silently discarded. You can end up analyzing a fraction of your data without realizing it. CSVPrune takes the opposite approach. The full dataset is parsed and held in the Rust backend, and the interface is a windowed virtual grid that only ever renders the handful of rows actually visible, requesting the next slice as you scroll. Filtering and sorting are computed against an index on the Rust side rather than by moving the whole table around, so search is instant and sorting is numeric- and date-aware — 9 sorts before 10, and real dates order chronologically rather than as text. Crucially, the complete row set never crosses the bridge into the frontend; the UI receives only summaries and the slice on screen. That architecture is what lets a file Excel refuses to open scroll as smoothly as a hundred-row sample, and it is the same reason cleaning operations stay responsive: the heavy work happens in compiled code, off the UI thread, with progress reported as it runs.

Trusted by pragmatic desktop users

Built for people who prefer tools that stay local.

Real workflows: focus timers that stay visible, batches that never leave the disk, and renames you can rewind.

Customer review 01

PinPoint: Always On Top saves me so much time as I can organize all my report materials without having to flip between windows or tabs. I love the fact that it is straightforward and simple.

Senior Accountant · Manufacturing Company · United States · PinPoint

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Customer review 02

I used to get so frustrated when my Taskbar would freeze and disappear. Taskbar Sentinel has eliminated that pain without subjecting me to another subscription.

Darren · Calgary, Alberta, Canada · Taskbar Sentinel

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Customer review 03

OpticBatch and MetaForge are a lifesaver for me as a person with a passion for photography. They give me the ability to stay organized and keep personal information confidential when I post pictures online.

Sherri · United States · OpticBatch & MetaForge

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Quotes are shown with customer permission; names and locations appear as reviewers provided them.

Our Core Moat

Engineered to respect your system boundaries.

System Resource Monitor (Idle State Comparison)
Automata Labs sub-5MB idle memory footprint compared to generic Electron applications

Lightweight Native Stack

Compiled Rust core wrapped inside an optimized Tauri shell. No heavy background node loops or duplicate Chromium engines cooking your memory footprint (<5MB idle RAM).

100% Local-First Privacy

Executes entirely on-device with full offline isolation. Absolute zero background telemetry policies, no metrics aggregation, and zero mandatory cloud-sync accounts.

Perpetual Fallback Licenses

Pay a single, clear one-time purchase price. Own your specific native software utility execution tier permanently without artificial subscription paywalls or ongoing usage tax.

FAQ

Straight answers—no glossary dump

How do I open a CSV that is too big for Excel?

CSVPrune is built for exactly this. It parses the file in a Rust backend and shows it through a virtualized grid that renders only the rows on screen, so files with hundreds of thousands of rows open quickly and scroll smoothly. There is no 1,048,576-row limit silently truncating your data, and searching, filtering, and numeric- or date-aware sorting are computed in the backend so they stay instant even on very large files.

Is CSVPrune private, and does it work offline?

Yes on both counts. CSVPrune runs entirely on your machine with no cloud, no telemetry, and no network access of any kind — there is no networking code in the app, so it works fully offline and nothing you load is ever uploaded. Your data stays in local memory for the session, and only minimal settings such as window state and recent paths (which you can turn off) are saved to disk. You can verify the zero-network behaviour with a connection monitor.

What file types and sizes does CSVPrune handle?

CSVPrune loads CSV files with comma, semicolon, or tab delimiters (auto-detected, with a manual delimiter and encoding override for UTF-8, UTF-16, and Latin-1) and is designed for large files, with smooth performance on hundred-thousand-row datasets and guidance up to around 500 MB. You can export your cleaned data to CSV, JSON, or XLSX, copy it to the clipboard, or use an audited export that adds a full before/after sidecar for compliance.

How much is CSVPrune, and is it a subscription?

CSVPrune is a one-time purchase on the Microsoft Store — no subscription and no account required to use it. You own the version you buy and it keeps working offline. Use the Microsoft Store button on this page for the current listing and price, and because the privacy posture is structural rather than a setting, you can verify the local-only behaviour yourself at any time with a network monitor.

Related pages

Clean the messy export in one repeatable pass. Remove duplicate rows — including the ones Excel misses. Fix the garbled export before it corrupts your data. Join two CSVs without fighting VLOOKUP.

Clean it once.
Replay it forever—on your machine.

CSVPrune opens the files that break Excel, fixes encoding and delimiter garble, dedupes by any column, builds calculated columns with a live formula engine, and saves your steps as a replayable recipe. Export to CSV, JSON, or XLSX. No cloud, no telemetry—verifiable with Wireshark.

$14.99 USD — Perpetual License

One-time purchase · Lifetime updates · Delivered via the Microsoft Store

Get it from Microsoft Store

Purchased and updated securely through the Microsoft Store. No account needed on our site, no subscription, and a Microsoft receipt for easy corporate expensing.

Open full product page

Technical specifications

Technical specifications for procurement

Spec Implementation
Data Sovereignty Every row stays in local Rust in-memory state for the session; the full dataset never crosses to the cloud and is serialized only for your explicit export or clipboard copy
Telemetry Status None; zero network code, verifiable with Wireshark or Resource Monitor
Core Runtime Rust + Tauri v2 backend (heavy CSV parsing, cleaning, and profiling stay in Rust) with a React 18 virtualized grid
Network Requirements Fully functional offline; no network access requested in the Tauri capability set
Deployment Compatibility Windows 10 and 11 via the Microsoft Store; macOS universal build via direct download
Import Auto-detects comma, semicolon, and tab delimiters; manual delimiter and UTF-8/16 + Latin-1 encoding override
Cleaning ops Trim, normalize emails, find/replace (regex), coerce number/currency/date/boolean, dedup-by-key, visual row prune, calculated columns
Automation Saved recipes, batch-run across a folder, and watch-folder auto-clean of new files
Export CSV, JSON, or XLSX, plus audited export with a full before/after sidecar JSON; ~500 MB file ceiling