Base64 File Encoder / Decoder
100% Client-Side. Files never upload to any remote server.
About CSV File Viewer
The In-Browser CSV & TSV Spreadsheet Viewer opens, parses, sorts, filters, and searches multi-megabyte CSV/TSV data files with pagination, column reordering, delimiter detection, statistical summaries, and JSON/Excel export.
How to Use CSV File Viewer
Step 1
Drag and drop a `.csv` or `.tsv` file into the viewer.
Step 2
Inspect the rendered spreadsheet table with automatic column header detection.
Step 3
Click column headers to sort ascending/descending or use the search bar to filter rows.
Step 4
Click "Export JSON" or "Download Filtered CSV".
Practical Use Cases for CSV File Viewer
Viewing Massive CSV Datasets Without Excel
Open and inspect 500,000+ row CSV files instantly in your browser without waiting for heavy desktop spreadsheet software to launch.
Filtering & Exporting Subsets of Data
Apply multi-column search filters, sort rows ascending/descending, and export filtered results to clean JSON or CSV.
Input & Output Examples
Viewing 50,000-Row Customer CSV
Uploaded customers.csv (14 MB file)
Interactive spreadsheet table with 50,000 rows, sortable column headers, search bar, and 50/100/500 pagination
Key Features & Performance
- ✓Auto-detects delimiters: Comma (`,`), Semicolon (`;`), Tab (`\t`), Pipe (`|`).
- ✓Sortable columns, multi-column search filter, and custom pagination (25 to 1,000 rows per page).
- ✓Computes column statistics: total rows, empty cells, unique count, and numeric sum/average.
- ✓Exports in CSV, TSV, JSON Array of Objects, and Markdown table format.
- ✓100% Client-Side memory execution.
- ✓1-Click Export.
Key Terminology & Definitions
CSV (Comma-Separated Values)
A plain text file format used to store tabular data where each line is a data record and fields are separated by delimiters.
Delimiter Auto-Detection
Analyzing the frequency and consistency of separator characters across the first 10 rows to determine whether a file uses commas, semicolons, or tabs.