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Upload Files

Columns provides secure cloud storage for uploaded datasets. After upload, each file can be used as a data connection for analysis and visualization.

Currently supported upload formats:

  • CSV
  • TSV
  • GZIP-compressed CSV/TSV (.csv.gz, .tsv.gz)

Why Use Compression​

Large CSV/TSV files are often highly compressible. Compression helps by:

  • reducing upload time
  • speeding up processing
  • lowering storage usage

Example: A 500 MB CSV may compress to around 20 MB.

How to Compress​

gzip large.csv
# output: large.csv.gz

Upload the compressed file directly. Columns handles decompression automatically.

Recommendation: compress files larger than 50 MB before uploading.