Can I control how much corruption?
Yes. Choose the problems and the amount.
Data tool
Dataset Corruptor
Damage CSV, TSV, JSON, or plain-text datasets on purpose so you can test importers, validators, ETL jobs, and cleanup workflows against messy data.
Runs Locally
This tool runs in your browser. Files never leave your device.
Drop a JSON, CSV, TSV, or TXT file here or paste data below.
Drag and drop a dataset file anywhere inside this input card.
Corrupted output
Detected CSV · 5 source lines · 242 B output
id,na,email,plan,active,score,created_at 1002,Jane Doe,jane@example.com,Free,,74,2026-06-03 1003,Sam Smith,sam@example.com,Team,true,88,2026-06-04 ,Avery Stone,avery@example.com,Pro,true,91, 1001�,false,laramie@example.com,,true,98,2026-06-01
Corruption report
Rows dropped
0
Rows duplicated
0
Rows shuffled
4
Values blanked
4
Values mutated
1
Types changed
1
Fields removed
0
Fields renamed
1
Junk inserted
1
Structure damage
0
What this breaks
Imports: missing rows, duplicated rows, changed delimiters, blanks, and broken structure.
Schemas: removed fields, renamed keys, changed value types, null-ish values, and malformed output.
Cleaning: junk characters, weird casing, truncated strings, fake nulls, and inconsistent values.
Testing: seeded output lets you reproduce the same messy dataset during debugging.
What this tool does
Dataset Corruptor adds controlled noise, missing values, and bad rows to a dataset so you can test how your pipeline handles imperfect data. It is built for data and ML teams who need realistic dirty data to validate cleaning, preprocessing, and quality checks before production.
How it works
Paste or upload your data, choose what kinds of problems to add and how much, and the tool generates a corrupted version in your browser. Copy or download it for testing. Nothing is uploaded.
When to use Dataset Corruptor
Validating a data-cleaning pipeline
Testing how a model handles missing values
Building realistic dirty data for QA
Stress-testing data quality checks
FAQ
Does it keep my original?
It corrupts a copy; your source data stays intact.
Are my files uploaded anywhere?
No. Everything runs in your browser and the data never leaves your device.
Related tools
View all toolsCSV Corruptor
Generate messy CSV data for import testing.
JSON Corruptor
Generate broken JSON to test error handling.
API Response Corruptor
Generate malformed API response samples.
Random Character Inserter
Insert random characters into text.
PII Detector
Spot personal information in text before sharing data.