You will get your messy Excel or CSV data cleaned, formatted, and analysis-ready
Project details
You will get a dataset that's finally ready for analysis, not one that fights you.
Messy data costs you money. Duplicate rows inflate your numbers. Dates stored as text break your formulas. Inconsistent names ("PT ABC" vs "abc, pt") make your pivot tables useless.
I fix all of that, and I document every single change:
• Duplicates removed, exact and near duplicates
• Dates, numbers, and currencies standardized to your preferred format
• Text cleaned: spaces trimmed, capitalization fixed, naming unified
• Blank rows, junk data, and broken headers removed
• A change log listing exactly what was cleaned, nothing silently deleted
Why me? I'm a civil engineer with 8+ years managing technical data at a major mining company. I treat your dataset the way I treat engineering reports: every change verified, every anomaly documented. You'll never wonder what happened to your data.
Need formulas, a pivot summary, or a simple dashboard on top? That's included in the Advanced tier.
Have a bigger dataset or a weird file format? Message me first, I'll scope it for free before you order.
Messy data costs you money. Duplicate rows inflate your numbers. Dates stored as text break your formulas. Inconsistent names ("PT ABC" vs "abc, pt") make your pivot tables useless.
I fix all of that, and I document every single change:
• Duplicates removed, exact and near duplicates
• Dates, numbers, and currencies standardized to your preferred format
• Text cleaned: spaces trimmed, capitalization fixed, naming unified
• Blank rows, junk data, and broken headers removed
• A change log listing exactly what was cleaned, nothing silently deleted
Why me? I'm a civil engineer with 8+ years managing technical data at a major mining company. I treat your dataset the way I treat engineering reports: every change verified, every anomaly documented. You'll never wonder what happened to your data.
Need formulas, a pivot summary, or a simple dashboard on top? That's included in the Advanced tier.
Have a bigger dataset or a weird file format? Message me first, I'll scope it for free before you order.
Data Entry Type
Copy Paste, Data Cleansing, Document Conversion, Error Detection, Online Research, Word ProcessingData Entry Tool
Google Docs, Google Sheets, Microsoft Excel, Microsoft Office, Microsoft WordWhat's included
| Service Tiers |
Starter
$15
|
Standard
$35
|
Advanced
$70
|
|---|---|---|---|
| Delivery Time | 2 days | 3 days | 5 days |
Number of Revisions | 1 | 2 | 3 |
Number of Hours of Work | 48 | 36 | 24 |
Formatting & Clean Up | |||
Graph & Table Creation | - | - |
Optional add-ons
You can add these on the next page.
Additional Revision
+$15Frequently asked questions
About Wijonarko
AI Training Data Specialist | Data Cleaning, Annotation & PDF to Excel
Banjarbaru, Indonesia - 6:52 pm local time
Bad data is expensive. Broken PDF exports waste your hours. Duplicate rows inflate your reports. And mislabeled training data teaches your AI model the wrong lessons, at scale.
I fix all three, with the same discipline: every value verified, every change documented, every ambiguity flagged instead of guessed.
WHAT I DO:
► AI Training Data Preparation, cleaning, structuring, and labeling datasets for machine learning. Text classification, entity annotation, prompt-response pairs, RLHF-style ranking. Output in JSONL, CSV, or your schema, delivered with calibration batches and a QA report so you can trust the labels before you train on them.
► Data Cleanup & Deduplication, messy spreadsheets turned into reliable ones. Duplicate removal, format standardization, validation rules, and a full change log of every edit, you'll know exactly what changed and why.
► PDF → Excel Conversion, manually verified line by line. Numbers stay numbers, tables stay whole, totals reconcile with the source.
WHY ME:
✔ I'm a civil engineer with 8+ years at one of Indonesia's largest mining companies, where a single wrong number in a report has real consequences. Accuracy isn't a selling point for me, it's a professional habit.
✔ Native Indonesian + fluent English: I annotate and QA Bahasa Indonesia datasets, a capability most annotators can't offer, and increasingly in demand as AI companies expand into Southeast Asian languages.
✔ Every project includes documentation: change logs for cleanups, QA reports for annotations, verification notes for conversions. You get the data and the audit trail.
Send me a sample of your file or dataset, I'll show you what the output looks like before you commit. Let's talk.
Steps for completing your project
After purchasing the project, send requirements so Wijonarko can start the project.
Delivery time starts when Wijonarko receives requirements from you.
Wijonarko works on your project following the steps below.
Revisions may occur after the delivery date.
1
I audit your file and confirm the cleanup scope with you
2
I clean the data: duplicates, formats, text standardization, and structure