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format

CSV

CSV is a plain-text table format that every spreadsheet and database can read.

Also known as Comma-separated values.

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What is a CSV file?

Rows of delimited values in plain text — the universal interchange format for tabular data.

Technical characteristics

Representation
text
Encoding
UTF-8
Lossy
No
Open specification
Yes

Compatibility

    Applications: Excel, Google Sheets, Numbers, every database.

    Advantages of CSV

    • Readable by everything
    • Tiny and streamable
    • No formulas to break

    Limitations to know about

    • No types, formatting or multiple sheets
    • Delimiter and encoding ambiguity across locales

    When to use CSV

    • Data export and import
    • Reporting pipelines

    Common mistakes

    • Opening a UTF-8 CSV in Excel without declaring the encoding, which mangles accents

    Convert CSV files

    CSV scores

    Deterministic scores calculated from the structured facts above. Identical facts always produce identical scores.

    Overall score

    75/100

    • Editing score

      100
      • lossless data survives repeated open-edit-save cycles without degrading
      • a broad range of applications read and write it

      Confidence 45% · evidence coverage 63%

    • Archiving score

      100
      • the specification is public, so a decoder can always be rebuilt
      • the specification is published openly
      • it is actively maintained and current
      • an openly specified format can be implemented without a licence negotiation

      Confidence 44% · evidence coverage 89%

    • Openness score

      100
      • the specification is published openly
      • an openly specified format can be implemented without a licence negotiation

      Confidence 32% · evidence coverage 100%

    • Longevity score

      100
      • it is actively maintained and current
      • the specification is published openly
      • the specification is public, so a decoder can always be rebuilt
      • it sits at the centre of the format ecosystem, with many documented relationships

      Confidence 46% · evidence coverage 100%

    • Compatibility score

      88
      • a broad range of applications read and write it
      • an open specification means cloud SDKs can implement it without licensing friction

      Confidence 54% · evidence coverage 50%

    • AI score

      86
      • open specifications are implemented by the open-source decoders that ML stacks rely on
      • the specification is published openly
      • a broad range of applications read and write it
      • large lossless payloads cost bandwidth and memory

      Confidence 42% · evidence coverage 100%

    • Printing score

      78
      • lossless data means no compression artefacts appear at print resolution
      • a broad range of applications read and write it

      Confidence 48% · evidence coverage 50%

    • Photography score

      63
      • lossless data survives repeated open-edit-save cycles without degrading
      • it stores data losslessly, so files stay large

      Confidence 32% · evidence coverage 44%

    • Web score

      25
      • the specification is published openly
      • it stores data losslessly, so files stay large
      • large lossless payloads cost bandwidth and memory

      Confidence 31% · evidence coverage 67%

    • Streaming score

      0
      • it stores data losslessly, so files stay large
      • large lossless payloads cost bandwidth and memory

      Confidence 21% · evidence coverage 50%

    • Performance score

      0
      • large lossless payloads cost bandwidth and memory
      • it stores data losslessly, so files stay large

      Confidence 21% · evidence coverage 100%

    What CSV is recommended for

    Every conclusion below is derived from the structured facts on this page — nothing is written by hand.

    • Software compatibility100/100

      • Because a broad range of applications read and write it.
      • Because several mainstream applications support it.

    • Cloud compatibility100/100

      • Because an open specification means cloud SDKs can implement it without licensing friction.
      • Because it converts into many other formats, which suits automated pipelines.

    • AI compatibility100/100

      • Because open specifications are implemented by the open-source decoders that ML stacks rely on.
      • Because lossless pixels avoid compression artefacts leaking into training data.
      • Because wide library support means common data loaders can read it.

    • Long-term archiving100/100

      • Because the specification is public, so a decoder can always be rebuilt.
      • Because lossless storage preserves the original data for future migrations.
      • Because it is a current, actively maintained format.

    • Professional editing100/100

      • Because lossless data survives repeated open-edit-save cycles without degrading.
      • Because professional applications read and write it.

    • Open standards100/100

      • Because the specification is published openly.

    • Licensing100/100

      • Because an openly specified format can be implemented without a licence negotiation.

    • Popularity100/100

      • Because it sits at the centre of the format ecosystem, with many documented relationships.
      • Because mainstream applications ship support for it.
      • Because it is still current rather than being phased out.

    • Future-proofing100/100

      • Because it is actively maintained and current.
      • Because open specifications outlive the companies that create them.
      • Because nothing in the graph supersedes it yet.

    • Printing suitability71/100

      • Because lossless data means no compression artefacts appear at print resolution.

    What CSV is not recommended for

    • Web suitability33/100

      • Because lossless payloads cost more bandwidth than the web usually justifies.

    Related to CSV

    File extensions

    Media types

    Compared with

    Supported by

    Data quality

    Every claim on this page is classified as a verified fact, a derived fact or an assumption.

    Overall confidence
    80%
    Verification status
    verified
    Last reviewed
    2026-08-03
    Verified facts
    1

    1 classified claim backed by 1 source.

    • Convert Always editorial review — Convert Always

    Sources and review status

    Review status: verified · confidence 80%

    Last reviewed 2026-08-03 (revision 1).

    • Convert Always editorial review — Convert Always