Skip to content
Catalog online // 4,998 apps
Data & Spreadsheets

Data Anonymizer.

Create a bounded anonymized CSV without uploading source values or retaining a hidden reverse mapping. Mask, hash, tokenize, generalize or synthesize selected CSV columns locally, then independently reparse and verify every transformed cell before download.

Use Data Anonymizer

Private in this browser. The CSV, selected columns, salt, key, transformed preview and output stay in this browser and are not sent to a server.

No file selected.
Tool options

Options appear after the file is inspected locally.

Preparing the local tool…

How it works

  1. 01

    Choose one UTF-8 CSV up to 25 MB.

  2. 02

    Name the columns and policies in JSON, supplying an explicit salt or key where required.

  3. 03

    Review only transformed sample rows and download after the independent full source/output comparison passes.

Frequently asked questions

Does the preview expose original values?

No. It renders only the first five transformed rows after policies have been applied.

Is a reverse map embedded?

No. The verifier requires the exact source schema and rejects extra mapping columns.

Does Data Anonymizer upload my data?

Data Anonymizer runs locally in your browser. The CSV, selected columns, salt, key, transformed preview and output stay in this browser and are not sent to a server.

Large CSV ViewerStream, search and page through a CSV locally while keeping every value as text, then independently rescan the source before downloading a bounded JSON report.Data File PreflightInspect encoding, delimiter, schema, row count, malformed records, nulls and size before processing. Processing is local and independently checked.CSV CleanerReview detected delimiter and UTF-8/UTF-16 encoding, then repair whitespace, blank rows, quoting and newlines to normalized UTF-8 CSV.
Need a complete application?

Explore AI-ready source code or build your own.

Browse catalogBuild my app