Launched this week

CSV Repair & Deduper

Launched this week

Clean broken and duplicate CSV rows offline—$19 once

15 followers

Clean broken and duplicate CSV rows offline—$19 once

15 followers

Repair malformed CSV exports and review exact or fuzzy duplicates without uploading customer data. This downloadable single-file tool runs locally in your browser, detects common delimiters and encoding issues, flags uneven rows, and lets you review, edit, undo, and export every change. Unlike automatic “black box” cleaners, near matches remain suggestions for human review. $19 once, no subscription.

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Launch tags:Productivity•Privacy•Data & Analytics

Launch Team

Viktor.comAn AI coworker that actually does the work

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Maker

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Hi Product Hunt — I built CSV Repair & Deduper for people cleaning CRM contacts, ecommerce orders, and other business exports who don’t want to upload customer data to a server. It’s a downloadable single HTML file that runs locally in your browser. It can: 1.detect comma, semicolon, tab, and pipe delimiters 2.handle quoted and multi-line cells 3.identify common encoding issues 4.flag uneven rows 5.separate exact duplicates from adjustable near-match suggestions The review-first workflow is intentional: similar records are suggestions, not automatic deletions. You can inspect and edit rows, undo changes, and export the cleaned file locally. It’s $19 once, with no subscription. The downloaded version keeps working permanently and includes all version 1.x fixes and improvements. There are also 28 free CSV-cleanup guides with manual Excel and Python methods: https://store.marabusiness.net/s... Honest current state: production and checkout are live, but I don’t yet have evidence of demand for the $19 offer. I’d especially value feedback on the offline/privacy positioning, the review-first workflow, and the price.

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2d ago

Maker

Hi Product Hunt 👋

You can use part of this right now without paying or signing up: drop a CSV on the product page and it will tell you what's actually wrong with it — exact duplicate rows, near-duplicates that exact matching misses, malformed rows, broken quoting, encoding damage, and columns whose leading zeros Excel is about to destroy.

The part I care most about: your file never leaves your browser tab. Don't take my word for it — open DevTools → Network before you pick the file and watch nothing carrying your data go out. That's the whole reason I built this. Plenty of CSV cleaners want you to upload a customer list to someone else's server, which is a nonstarter for lead lists or contact exports. There are good client-side ones too — what I wanted specifically was duplicate review: seeing the near-duplicates that exact matching misses and deciding on each one myself, rather than a tool silently dropping rows.

The free check reports problems. The $19 download is the thing that fixes them: review each suggested removal, edit rows inline, undo/redo, and export the cleaned CSV. Same offline single-HTML-file architecture, no subscription, 14-day money-back guarantee.

Honest limitations, also on the page: it's a browser tool, so very large files get slow and the free in-page check caps at 20 MB. Near-duplicate matching is similarity scoring, not judgement — you review every suggested removal, nothing is deleted for you.

One thing I'd genuinely like feedback on: the near-duplicate threshold. My first version reported ~200 "near-duplicates" in a completely clean file, because clean1@x.io and clean2@x.io are 92% similar as strings. Sequential identifiers are now explicitly excluded. If you run it on a real export and it flags something it shouldn't, tell me — a dedupe tool that cries wolf is worse than no tool.

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1d ago

Forum Threads

p/csv-repair-deduper

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1d ago

What would make you trust a cleaned CSV before importing it?

I m building CSV Repair & Deduper and want to understand what proof matters before someone imports cleaned data into a CRM, store, or accounting system.

Which would give you the most confidence: a before/after row count, a list of duplicate groups, a change summary, column validation, or something else?

The tool runs locally in the browser, but local processing alone does not prove the output is correct. I d rather prioritize the audit evidence people actually use. Please don t share real customer data just the checks that matter in your workflow.

p/csv-repair-deduper

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1d ago

What usually breaks your CSV import: formatting or duplicates?

CSV cleanup problems tend to fall into two buckets:

1. File-format issues wrong delimiter, legacy encoding, quoted multiline cells, or uneven rows.

2. Data-quality issues exact duplicates and near-duplicates such as nickname or spelling variants.

I built CSV Repair & Deduper because both often need attention before a CRM, storefront, or mailing-list import. It runs locally in your browser and lets you review suggested duplicate removals before changing anything.

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Hi Product Hunt 👋