CSV Size Analyzer
Check CSV size, GZIP savings, delimiter, rows, and columns locally before you compress, upload, or share a dataset.
Analyze a CSV file
CSV, TSV, TXT, and gzipped CSV files up to 300 MB.
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Quick start
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Upload a CSV or CSV.GZ file
Choose a CSV, TSV, TXT, or gzipped CSV file from your device.
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Review size metrics
Compare raw CSV size, GZIP size, compression ratio, rows, and columns.
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Check delimiter and preview
Confirm the detected delimiter and inspect the first rows before sharing or compressing the file.
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Download the GZIP file
Save the compressed .gz file when the estimated size looks right.
Data stays on your device
Files are read and compressed locally in your browser. Nothing is uploaded to ChatDB.
The CSV Size Analyzer calculates the actual gzip-compressed output size, detects the delimiter, counts lines, and previews the first rows without sending your data to a server.
0 bytes
Data transmitted
300 MB
Max file size
CSV + GZ
Formats
Actual GZIP Size
Compresses the file locally so the reported .gz size is real, not a rough ratio.
Delimiter Detection
Detects comma, semicolon, tab, and pipe-delimited files before you load them elsewhere.
Private by Default
All analysis runs in your browser, keeping file contents on your device.
Fast File Checks
See size savings, line counts, columns, and preview rows in one quick pass.
Does this CSV size analyzer upload my file?
No. The analyzer runs entirely in your browser. Your CSV or gzipped CSV file never leaves your device.
How accurate is the GZIP size estimate?
The tool computes the actual GZIP output in your browser, so the reported compressed size reflects the downloadable .gz file it creates.
Can I use this for CSV.GZ files?
Yes. Upload a .csv.gz or .gz file to compare its compressed size with the decompressed CSV size and inspect the delimiter.
What delimiters can it detect?
The analyzer detects common CSV delimiters including commas, semicolons, tabs, and pipes, then shows a small preview using that delimiter.
Why check CSV size before compressing?
CSV files often compress dramatically because repeated delimiters, headers, and values are ideal for GZIP. A quick size check helps you estimate storage, transfer time, and upload limits before you move large datasets.
CSV delimiter and row checks
File size is only part of the handoff. The analyzer also surfaces the detected delimiter, line count, column count, and first rows so you can catch TSV exports, semicolon-separated reports, or malformed headers before opening the file in another tool.