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CSV Repair & Deduper
Clean broken and duplicate CSV rows offline—$19 once
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.
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.
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 [email protected] and [email protected] 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.
About CSV Repair & Deduper on Product Hunt
“Clean broken and duplicate CSV rows offline—$19 once”
CSV Repair & Deduper was submitted on Product Hunt and earned 0 upvotes and 2 comments, placing #104 on the daily leaderboard. 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.
CSV Repair & Deduper was featured in Productivity (658.2k followers), Privacy (11.3k followers) and Data & Analytics (5.8k followers) on Product Hunt. Together, these topics include over 164.6k products, making this a competitive space to launch in.
Who hunted CSV Repair & Deduper?
CSV Repair & Deduper was hunted by MARA YOLO. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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