Services · Excel Data Cleaning
Excel Data Cleaning Freelancer for Businesses That Run on Excel
Power Query pipelines that tidy, deduplicate and validate source data - and fail loudly when something drifts..
- data cleaning
- power query
- validation
- pipelines
Bad data is the silent tax on every dashboard. The report renders. The numbers print. The board meeting happens. And somewhere a duplicate row, a missing ID or a date in 2099 was already wrong before any of it started - the report just faithfully reported it. CA firms see this on every reconciliation; finance teams see it on every month-end close.
The fix is not another analyst cleaning by hand. The fix is a Power Query pipeline that runs on every refresh, types every column, deduplicates, validates, and surfaces the bad rows before they reach the report. The pipeline documents every transformation so the next analyst can read it - not just inherit a mess.
That is what I build. Fixed scope, fixed price, written handover, and a workbook that survives the next refresh and the next person on the team.
What I do
How a data cleaning engagement runs.
Trim, dedupe, type, validate
Power Query pipeline that handles whitespace, case, duplicates, type coercion and explicit validation checks. Every transformation is named and documented.
Validation that fails loudly
Null order IDs, negative amounts, out-of-range dates, missing sources - caught at the pipeline step. The refresh aborts and the owner is notified by email.
Documented M-code the next analyst can read
Every step is named in plain English. The next analyst can extend the pipeline without learning M from scratch - a written spec explains the intent.
Survives the next hand-off
When the analyst who wrote the pipeline moves on, the next person can run, audit and extend it without breaking anything. That is the test a cleaning pipeline has to pass.
Free Self-Serve Excel Tools
Interactive in-browser calculators and diagnostics. No sign-up, no email required.
Workbook Compare
Drop two versions of a file and see every changed cell and formula, inserted rows, and formulas someone typed over.
Workbook Map
See how your sheets feed each other as a diagram, with links to other files, hidden feeders and circular links flagged.
Formula Explainer
Paste any formula and read it in plain English, step by step in the order Excel calculates it.
Related
Keep reading
Service
Fictional Excel Reporting Demo
Fictional Excel reporting demonstration with invented data, a sample monthly summary, and illustrative workflow checks
Service
Sample Scoping Sprint Deliverable
A worked Scoping Sprint on a fictional workbook - the written diagnosis, fixed-price proposal and Definition of Done you receive
Service
Spreadsheet Audit & Repair
Excel spreadsheet audit and repair - 7-check audit that catches the common errors in 10 minutes. Written remediation report + fix. From ₹6K fixed scope 1-day delivery.
Service
Excel Automation
Automate monthly Excel reporting with Power Query and VBA. Replace recurring exports, cleanup, refreshes, and distribution with a fixed-scope workflow and documented handover.
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Excel VBA / Macros
Excel VBA and macros for reconciliation, mail merge, PDF export and scheduled refreshes.
Service
Excel Dashboard Design
Excel dashboard design - KPIs, slicers and one-click refresh. Power Query + Pivot or Power Pivot.
Service
Financial Modeling
Financial modeling in Excel - three-statement, budget, scenario forecasts and sensitivity tables.
Service
Power Query / Power BI
Power Query and Power BI builds - refreshable M pipelines, validated transformations and dashboards your team can hand off.
Service
Google Sheets Automation
Google Sheets automation with Apps Script - triggers, validation and Connected Sheets for BigQuery-scale data.
Service
Excel Error Fixing
Excel error fixing - broken VLOOKUP, #REF, #VALUE and slow files. Free tools first, then a fixed-quote Quick fix from $75 / ₹6K.
Deliverables
What you receive at handover.
Every transformation is named in plain English. A written spec explains the intent so the next analyst can extend without re-reading the M-code from scratch.
- Power Query pipeline against the named source(s)
- Checks tab with explicit pass/fail criteria
- Documented M-code (each step named in plain English)
- Diff report when historical data is being cleaned
- Email notification on validation failure
- Written specification, recorded walkthrough, 30-day support
Tools
What I work in.
Power Query for the pipeline. Fuzzy match for messy joins. Excel profiling for triage. Power Automate for failure notifications.
- Power Query (M)
- Fuzzy match for messy joins
- Data type coercion and validation patterns
- Excel data profiling for triage
- Power Automate for failure notifications
- OneDrive / SharePoint for source landing zones
Common next step
Pair this with Power Query / Power BI when the cleaned data needs to feed a self-serve dashboard.
Process
Three stages, fixed scope.
- Step 01
Profile
I profile the source - counts, types, null rates, duplicate rates, sample of bad rows. You see the real state of the data before we agree the scope.
- Step 02
Build
Power Query pipeline is written against the live source in short loops. You see a working draft before the polish - and the validation checks are in from the start.
- Step 03
Hand over
Recorded walkthrough, written spec, documented M-code. Your team can run, audit and extend the pipeline without me.
Frequently asked
Before you hire an Excel data cleaning service.
How do you handle source drift when data changes underneath?
Every cleaning pipeline ends with explicit validation checks - null IDs, negative amounts, out-of-range dates, missing sources. If a check fails, the refresh aborts and the owner is notified by email before the bad data reaches the dashboard.
Can you clean historical data we already have in spreadsheets?
Yes. I run the cleaning pipeline against the historical file, write the cleaned output to a new tab or file, and produce a diff report so you can see what was changed and why. The original file is left untouched.
Related
Pair this service with…
Get a Free Quote
Send a sample of the messy source. Get a fixed price to clean it.
Reply within one working day. NDA before any file is exchanged.
Calls scheduled in your timezone (UK, EU, US, UAE, APAC) · How a project works
Built for teams in
Industries and cities this work is set up for
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