Open any .csv in a clean, scrollable table — proper columns, instant search, real filters. Even files with millions of rows open in seconds, and nothing you open ever leaves your PC.
Open a CSV in a text editor and you get a wall of commas with no columns. Open it in Excel and a big one freezes, truncates rows past a million, or turns your IDs into scientific notation. A dedicated viewer just shows you the data — properly.
Most people come to view, then realize they want to do something. Gridzu is ready for that: remove duplicates, compare two files, convert Excel to CSV, or clean and export — all point-and-click, no formulas. See the full large-file story too.
Every file you view is read on your own machine — Gridzu never sends it to our servers. The only thing our service stores is the email you sign in with.
Gridzu is a free CSV viewer for Windows 10 and 11 that opens CSV files in a clean, scrollable table. Unlike a text editor it shows proper columns, and unlike Excel it opens very large files without freezing or truncating rows. You can search, sort, and filter, and edit and export if you need to.
Yes. Gridzu opens CSV files directly — you don't need Excel or any spreadsheet installed. It reads the file into a table you can browse and search right away.
Both. Gridzu opens CSVs for viewing, and if you want to make changes you can edit cells, clean the data, remove duplicates, and export a fresh CSV back out.
Yes. Gridzu is free to download and use on Windows and macOS, and your files are read locally — nothing is sent to our servers.
Free for Windows · works offline · private and local.
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