See which columns of the latest file look personal (email, phone, name) and whether a masking step handled them. Names are guessed, values are never read. Free.
Quick answer: Free data lineage: transform data, then download the result with its lineage report.
How to use the How to Check Personal Data Was Masked
Free data lineage: transform data, then download the result with its lineage report.
Data Lineage is a free data lineage tool that records the full history of a file as you work. Transform your data in Data Utility (convert, clean, join, mask, filter, query) and every step is kept: the input file and where it came from, the transformation and its settings, and the output with its row count. Open the graph to inspect any step, then follow any single column: a column lineage table shows what every step did to it, and a personal data check shows whether columns that look personal were masked. Then share the proof: download the result together with a lineage report. The report is a single HTML page, a tree from the input file through each transformation to the result, plus a JSON copy and a SHA-256 checksum of the file. Everything runs and is stored in your browser; nothing is uploaded and no account is needed.
Run any tool and save or download the result
Open Data Lineage to see the graph, and pick a column in Follow a column to trace it
Click Result + lineage to download the file with an HTML lineage report
Tips
Use a saved file in another tool and the new file keeps the whole chain.
Open the Column lineage table to see what each step did to every column: kept, changed, added, renamed, moved or dropped.
Every download bar has a Result + lineage button that creates a ZIP with your file, LINEAGE.html and lineage.json.
Send the ZIP to a colleague or auditor as proof of what was done to the data.
History is stored in this browser only.
Example
Input: customers_final
Output: email · masked (Data Masking) · name · not masked
It looks at column names such as email, phone or name and at the recorded steps. A column counts as masked when a Data Masking step listed it. Your values are never read.
Is it a compliance guarantee?
No. It is a quick check based on names and recorded steps, useful before you share a file. Review the data itself for anything sensitive.
Is the data lineage tool free?
Yes. It is free, needs no account and runs in your browser.
How do I share the lineage with my result?
Use Result + lineage in any download bar, or on the Data Lineage page. You get a ZIP with your file, a LINEAGE.html report and a lineage.json copy.
Does it show column-level lineage?
Yes. Pick a column in Follow a column, or open the Column lineage table. Each step is labelled kept, changed, added, renamed, moved or dropped, and new columns show which columns they were built from. Columns are recorded for results you save or download.
What does the lineage report show?
A tree from the input file(s) and where they came from, through every transformation with its settings, to the result with its row count and SHA-256 checksum.
What is Data Lineage?
Data Lineage shows the history of your files as a graph: which tool masked, converted or cleaned a file, and what it did. Click a step to see details, such as which column was masked and how. It is saved in your browser next to Recent files and is never uploaded.
Where is my Data Lineage stored?
Only in your browser, next to Recent files. It is never uploaded. You can name each lineage, and deleting a file deletes its history.
Free Data Lineage Tool: A free data lineage tool for files: transform data, see input, transformations and result as a graph, and download a shareable HTML report. No signup.
Data Lineage Report as HTML: Download a data lineage report as one HTML page: a tree from the input file through every transformation to the result, with a SHA-256 checksum.
Share Your Data Together with Its Lineage: Send a result file and the proof of how it was made in one ZIP: your data, an HTML lineage report and a JSON copy. Free, made in your browser.
Data Audit Trail for CSV and Excel Files: Keep an audit trail of what was done to a CSV or Excel file: conversions, cleaning, joins and masking, with the settings used. Free, in your browser.
Data Provenance Tool for Files: Record where a data file came from and every transformation applied to it. See it as a graph and export an HTML provenance report. Free, no upload.
What Is Data Lineage? Track It Free: Data lineage shows where data came from and what happened to it. Learn the basics and track it for free for any file you process.
Data Lineage for Excel Files: Track data lineage for Excel files: what came in, which steps changed it and what went out. Download the lineage with your result. Free.