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Clean sensitive CSVs withoutuploading them anywhere.private offline CSV editor

CSVPrune processes every row in local memory and contains no networking code — point a connection monitor at it and watch it make zero calls. Your customer data never leaves the device.

CSVPrune processes every row in local memory with no networking code at all, so sensitive customer data never leaves your machine — verifiable with a connection monitor.

$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 CSV is full of customer data, and the cleaner you found wants you to upload it.

Most quick online CSV tools ask you to drop your file onto their server. That file is a list of real names, emails, order histories, or salaries — exactly the data you are not supposed to hand to an unknown third party just to strip some whitespace.

Where tooling usually breaks

An upload you can't see is a risk you can't justify.

Once sensitive records leave your machine you cannot prove where they went, how long they are kept, or that they were ever deleted. For anyone bound by a privacy policy, a DPA, or simple common sense, "paste it into a website" is not an option.

Where CSVPrune lands

Everything runs on your machine, and you can prove it.

CSVPrune processes rows entirely in local memory and contains no networking code at all — the app requests a deliberately minimal permission set with no network access. Open a connection monitor and watch it make zero outbound calls while it works. Nothing is uploaded, nothing is logged off-device, and only tiny non-sensitive settings (window size, recent paths you can disable) are ever written to disk.

$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 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.

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.

Deep dive

What "100% local" means in CSVPrune — and how to verify it

Privacy claims are easy to make and hard to trust, so CSVPrune is built to be checkable rather than taken on faith. The application contains no networking code: it requests a deliberately minimal capability set — native open and save dialogs, a small settings store, and window controls — and grants itself no network, HTTP, camera, microphone, or location access. There is simply no code path that could upload your file. Your CSV data lives only in the Rust backend's in-memory state for the lifetime of the session, and is serialized solely when you explicitly export or copy. The complete row set never even reaches the web layer of the app, let alone the internet. The only things written to disk are tiny JSON settings — window size, last-used options, and recent file paths, the last of which you can disable so no paths are recorded at all. Nothing logged contains your data. Because the privacy posture is structural, you can confirm it yourself: open Resource Monitor's network tab or a tool like Wireshark, filter to the CSVPrune process, and clean a file while you watch it make zero connections. For teams bound by a privacy policy or a data-processing agreement, that verifiability is the whole point.

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

Does CSVPrune upload my CSV anywhere?

No. CSVPrune contains no networking code and requests no network permission, so it cannot upload your file. Every row is processed in local memory and the full dataset never even reaches the app's web layer, let alone the internet. The only things written to disk are small settings like window size and recent paths, which you can disable. You can confirm all of this yourself by watching the process in a network monitor while you clean a file.

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. Open the CSV that makes Excel freeze — instantly. Fix the garbled export before it corrupts your data.

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