Processed locally — your file never leaves your device
Parquet Viewer
View Parquet files instantly in your browser — schema, row counts and a searchable, sortable data preview. Nothing is uploaded.
Parquet
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 .parquet file.
- Your browser reads the file locally and analyzes its schema — nothing is uploaded.
- Browse the row count, column types, and a searchable, sortable preview.
- Drop a different file anytime; each one is processed the same way, entirely on your device.
Frequently asked questions
- Is my Parquet file uploaded anywhere?
- No. The file is read and queried entirely on your device using DuckDB compiled to WebAssembly. It is never sent to a server or any third party.
- How large a Parquet file can I open?
- There's no server upload limit, since nothing is uploaded. The practical maximum depends on your device's memory, your browser, and how the file is organized.
- What Parquet features are supported?
- Standard Parquet files, including nested types like lists and structs, are supported. Encrypted files or unusual/corrupted files may show an error instead of a preview.
- Can I sort or search the data?
- Yes. Click a column header to sort by that column, and use the search box to filter rows — both run locally against the file, without loading the whole dataset into memory.
- Does this work with very wide tables (many columns)?
- Yes. The preview scrolls horizontally for wide tables, and search checks the first 30 columns to stay fast on very wide datasets.