Local data lab

Create a structured data test file

Generate contact-import and parser edge-case fixtures across eight real text formats. Preview the first records, download the generated bytes and keep a recipe with the output checksum and expected result.

Configure a data fixture

One versioned recipe creates synthetic records. Choose a parser edge case to exercise quoting, Unicode, line breaks and null values.

File formatTest purposeRecords (0–2000)Content seed

Maximum output: 2 MiB. Generation and SHA-256 hashing run in a browser worker. Changing settings cancels an active job. No files or recipe parameters go to a server.

Ready to generate.

Preview

First 4 records; the full file is encoded only when you select Generate.

id,name,email,active,notes
1,Ada Lovelace,person1@example.test,false,
2,Grace Hopper,person2@example.test,true,Sample contact
3,Katherine Johnson,person3@example.test,true,Sample contact
4,Alan Turing,person4@example.test,false,Sample contact