This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
Hey Product Hunt! 👋
My actual workflow: I get a lot of CSV/Excel files (many from college), and I want to analyze them with ChatGPT/Claude. Two things always annoyed me:
1. I want to control exactly which rows/columns I hand to the AI — not upload the whole file blindly.
2. I just want a quick sum of some numbers without writing =SUM() first.
So I made LazySheet, a fast, local-first desktop viewer for spreadsheets. Local-first means your files never leave your machine — no upload, no cloud, no account, no telemetry. It even works fully offline. The only thing that ever leaves your computer is the exact range you choose to copy into the AI. That's the whole point: you decide what the model sees.
The features I actually use:
- Copy as Markdown — select a range, copy, paste into the AI. Clean table, model reads it perfectly.
- Instant aggregates — select cells, the sum shows up. No formula needed.
- Opens big files fast — only renders visible rows, so 100MB CSVs don't lag.
- Column filters, group-by summaries, find-in-sheet.
Reads .xlsx / .xlsm / .xls / .csv / .tsv. Free, runs on macOS / Windows / Linux.
🔗 https://lazysheet.brata.cloud
Early release — happy to take feature requests or feedback. What would make this part of your workflow?
LazySheet was submitted on Product Hunt and earned 5 upvotes and 2 comments, placing #82 on the daily leaderboard. LazySheet is a fast, free desktop viewer for Excel, CSV and TSV files. Open huge sheets instantly with zero latency on macOS, Windows and Linux.
LazySheet was featured in Productivity (653.8k followers) and User Experience (366k followers) on Product Hunt. Together, these topics include over 170.6k products, making this a competitive space to launch in.
Who hunted LazySheet?
LazySheet was hunted by trias brata. 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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