Local-first CSV

Check your CSV before importing it.

Drop a CSV or TSV and get an actionable diagnosis. If the repair is safe, you can also download a corrected version without uploading the file to a server.

10 MB max. 50,000 rows 250 columns

Waiting for a file. The file name is not stored or included in the report.

2 free corrected downloads per day

The counter stays in this browser. It stores no names, rows, or CSV content. When it runs out, you can watch a short sponsored message to unlock one extra download.

Report

Safe, reusable diagnosis.

Samples are shown truncated. The rules explain what failed, where to look, what was corrected, and what should not be guessed before touching the destination system.

No analysis yet.

Upload a file or use the synthetic example to see the JSON contract in action.

Common CSV problems

If you arrived with a specific error, these guides explain what to check and when it is worth downloading a safe correction.

Delimiter CSV separated by semicolons When Excel and the destination system use different locales. Encoding UTF-8 BOM and strange characters To detect broken accents or headers with invisible marks. Headers Duplicate columns Before two columns with the same name get mixed. Safety Formula-like values Signals such as =, +, - or @ at the start of a cell. Shape Short, long, or badly quoted rows To locate missing fields, extra fields, or quote problems.

Privacy contract

Input: CSV or TSV read in the browser.
Output: Stable JSON and corrected CSV when repairs are deterministic.
Privacy: No upload por defecto, sin analytics de contenido, sin nombres de archivo en reportes.
Outside this version: No storage or upload by default. Payments, API, and history will be evaluated separately.

Fair access, no surprises.

You can try the diagnosis and download safe corrections for free. To manage costs, measure real use, and keep access fair, corrected downloads have a local daily limit and one extra download through a rewarded message.

The rewarded unlock does not read your file. If a real ad network is connected, it will use consent, a clear reward, and a visible policy before loading external scripts. Voluntary support, when active, opens an external payment page; Piojo Lab does not store card data.

Legal notice

Piojo Lab generates automatic checks to help you detect common issues before importing data. It does not guarantee compatibility with every destination system or replace human review when a file contains figures, operations, regulated data, or critical information.

Review the corrected CSV before importing it. You use this tool under your own responsibility, and the current rules may not cover every case in your system.