Processed locally — your file never leaves your device
CSV Viewer
Open and browse CSV or TSV files directly in your browser — delimiter auto-detected, nothing uploaded.
CSV
Drop a spreadsheet or data file hereor click to choose a file from your deviceNothing is uploaded — everything happens on your device.
How it works
- Select or drop a .csv (or .tsv) file.
- Your browser reads the file locally and detects its delimiter — nothing is uploaded.
- Browse the row count, column count, and a scrollable preview of the data.
- Drop a different file anytime; each one is processed the same way, entirely on your device.
Frequently asked questions
- Does this upload my CSV file?
- No. The file is read and parsed locally in your browser. It's never sent to a server or any third party.
- How is the delimiter detected?
- The viewer automatically detects the most likely delimiter — comma, tab, semicolon or pipe — from the file's content, so tab-separated (TSV) files work the same as comma-separated ones.
- Can it handle quoted fields and values with line breaks in them?
- Yes. Quoted fields, embedded commas inside quotes, and multi-line quoted values all parse correctly.
- How large a CSV file can I open?
- There's no server upload limit, since nothing is uploaded. The practical maximum depends on your device's memory and browser — large files are parsed off the main thread so the page stays responsive, and only the visible rows are ever rendered.
- What if my file uses a different text encoding?
- UTF-8 files, including those with a leading byte-order mark (BOM), are handled automatically.