Free public tool · DeTLeng

Messy CSV?
Clean it.

Drop a file. Fix common data mess. Preview every change. Download a clean copy.

Remove blank rows and duplicates, trim spaces, inspect missing values, rename or remove columns, change text case and download the cleaned CSV — without intentionally uploading your data to DeTLeng.

Free to use No sign-up Browser processing Original file untouched
Clean a CSV → Doing this every week? ↓
Data cleaning engineBrowser ready
Before · messy.csv
Name
EMAIL
city
Naveed
INFO@DETLENG.COM
longford
Naveed
INFO@DETLENG.COM
longford
After · clean.csv
Name
Email
City
Naveed
info@detleng.com
Longford
Customer 2
hello@example.com
Dublin
Upload → Inspect → Clean → DownloadOne file at a time. No unnecessary system around it.

The CSV Cleaner

Your file in.
Cleaner data out.

Start with the obvious mess. Keep control over every change. The tool works on a copy in your browser; your original file remains untouched on your computer.

Waiting for a file.

Your first 100 rows will appear here for preview.

Rows—
Columns—
Missing cells—
Changes0
Column manager
Select columns, rename them, remove them or change text case.
No CSV yet.Choose a file on the left. We will parse it, show a preview and let you clean a copy in your browser.

Privacy by simplicity

Your CSV stays in your browser.

The cleaner is designed to process the selected file locally in your browser. DeTLeng does not intentionally upload the contents of your CSV for this cleaning process. When you download the result, a new cleaned copy is created; your original file is not overwritten.

The bigger opportunity

Clean one file free.
Cleaning the same files every week?

That is no longer a CSV problem. It may be a workflow problem. If the same file keeps arriving, the same columns keep needing repair, the same data has to be merged and the same report has to be created, much of that process may be suitable for automation.

Show Us the Manual Work → Bring Us the Problem →
01
CSV arrivesEmail, shared folder, export or upload.
02
Data gets cleanedTrim, standardise, validate, remove duplicates and unwanted rows.
03
Information gets combinedMatch it with a master sheet, database or another source.
04
Output gets producedReport, clean file, dashboard, notification or next workflow step.
05
You stop repeating it manuallyThe goal is not technology. The goal is less repetitive work.

The wider network

A free tool in front.
Wider capability behind it.

CSV Cleaner is one small public utility. Across DeTLeng and AapKaUstaad, the wider work spans problem-solving, automation, AI, research, platforms, business and educational solutions.

Digital ecosystemDeTLeng↗ Working systemsPlatform↗ Research & thinkingInsights↗ EvidenceCase Studies↗ Applied intelligenceInteligencia↗ AI capabilityAgents↗ Repeated workAutomation↗ BusinessBusiness Solutions↗ Solution providerMNI↗ Longford · IrelandLFDS↗ Free public utilityQR Studio↗ EducationEducational Solutions↗ Education initiativeAL-NOOR↗

Useful first. Promotional second.

If this cleaner saves five minutes, good.
If the process wastes five hours every week, talk to us.

Use the tool freely. If your real problem is repeated data cleanup, reports, spreadsheets, documents, customer information or a process that should work better, there may be a more permanent solution.
Clean Another CSV ↑ Explore Automation → Email DeTLeng → WhatsApp Naveed →