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I have a collection of roughly 1,000 spreadsheets holding customer information that now need a meticulous data-accuracy audit. The files are a mix of Excel and Google Sheets; each one contains contact details—emails, phone numbers, postal addresses—alongside basic transaction history. Your task is to comb through every row and flag or correct any inaccuracy you find. For contact data that means checking whether emails are validly structured, phone numbers contain the right country codes and digit counts, and addresses are not obviously malformed or incomplete. On the transaction side I want confirmation that dates, amounts and references line up with the source data I will supply as a CSV lookup file. Where something is clearly wrong, update it; where the value is doubtful, highlight the cell and add a brief note in an “Issue” column I have already inserted for you. Deliverables • A cleaned version of each spreadsheet returned in the same folder structure, with all confirmed corrections applied • A single consolidated log (CSV or XLSX) listing every correction or unresolved issue, including sheet name, row reference and a short comment If you already work comfortably with Excel functions, Google Sheets, data-validation tools or scripting approaches such as VBA / Apps Script to speed up repetitive checks, feel free to use them—I’m interested in accuracy and a repeatable process more than in manual proofreading alone. I will spot-check the first batch; if your work passes, we proceed to the remaining files.
Project ID: 40647964
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112 freelancers are bidding on average $20 USD/hour for this job

Hi There, We can help you audit and clean your 1,000+ Excel and Google Sheets files with a strong focus on accuracy, consistency, and traceability. Our team is experienced in Excel, Google Sheets, data validation, reconciliation, and large-volume data cleanup. We can Validate emails, phone numbers, and addresses, Cross-check transaction dates, amounts, and references against your CSV source, Correct confirmed errors and flag doubtful entries, Maintain your existing “Issue” column with clear notes, Deliver cleaned files in the same folder structure, Prepare one consolidated correction/issue log in CSV or XLSX. We typically work on an hourly basis and operate 9:30 AM–6:00 PM IST, Monday to Saturday. Phone calls are not included in our service scope. Hit me up and we can talk in detail Regards, Nikita and her team at Affiliazion (D)
$15 USD in 40 days
8.1
8.1

With over 5 years of diverse experience as a data analyst, I am confident in my ability to meticulously comb through your set of approximately 1,000 spreadsheets, performing an in-depth analysis to ensure that your customer data is not only accurate but also meaningful. I have worked with both Excel and Google Sheets extensively and am familiar with advanced spreadsheet functionalities such as VBA / Apps Script and data-validation techniques, all of which will help expedite the thoroughness of this task. My goal at the end of this project is to provide you with a clean version of each file containing all confirmed corrections and a consolidated log accounting for every correction or unresolved issue within the provided timeframe. As a detail-oriented individual, I take pride in maintaining a rigorous quality control process to guarantee the highest level of accuracy possible. Not only do I have the necessary technical skills that are essential for this project, but my passion for organizing vast amounts of data and my natural knack for spotting irregularities make me an ideal fit for this task. I understand that your scope hinges on meticulous accuracy and seamless coordination -- areas where I excel. Let's leverage my skills to deliver outstanding results on time and within budget!
$15 USD in 40 days
7.7
7.7

Hi there, I have already checked the project details. The job is clear, so please contact me, and then we can discuss. Thank you.
$15 USD in 40 days
7.0
7.0

Hi there, I understand you need a meticulous data-accuracy audit across roughly 1,000 Excel and Google Sheets files, covering customer contact details as well as transaction data, with every correction or uncertainty properly documented. My approach would be to first establish validation rules for email structure, phone country codes/digit counts and address completeness, then use Excel, Google Sheets, Python/pandas and automated validation scripts to process repetitive checks consistently rather than relying solely on manual review. For transactions, I’ll compare dates, amounts and references against your supplied CSV lookup data and apply corrections only where the source supports them. Where an issue is confirmed, I’ll correct the value; where it is uncertain, I’ll highlight it and record the reason in the existing Issue column. I’ll also preserve the original folder/file structure and avoid unnecessary changes to valid data. I’ll first process a representative batch for your spot-check, refine the validation rules based on your feedback, and then apply the same repeatable process across the remaining files. You’ll receive the cleaned spreadsheets in their original structure plus one consolidated CSV/XLSX audit log containing every correction or unresolved issue, with file/sheet, row reference and explanation. Please share the first batch and CSV lookup file, and I’m ready to begin. Warm Regards, Aneesa.
$15 USD in 40 days
7.1
7.1

AVAILABLE TO START IMMEDIATELY..,,. I will meticulously audit, correct, and log all data inaccuracies across your 1000 spreadsheets using advanced Excel, Google Sheets, and VBA scripting for efficient and accurate processing, providing cleaned files and a detailed consolidated issue log. 10+ years Advanced Excel experience, Certified VBA Programmer, MBA.
$15 USD in 1 day
6.6
6.6

Hello Sir, I can handle the data-accuracy audit across your Excel and Google Sheets files using a structured, repeatable quality-control process rather than relying solely on manual proofreading. ✅ Why Me? ✔ Extensive experience in Excel data cleaning, validation, database auditing, and large-scale spreadsheet management ✔ Strong knowledge of Excel formulas, data validation, lookup functions, duplicate detection, and structured error checking ✔ Comfortable working with large volumes of customer data while maintaining consistent validation standards ✔ Experienced in comparing spreadsheet records against CSV source data and documenting discrepancies clearly ✔ Can use VBA, scripting, or automated checks where appropriate to improve efficiency without compromising accuracy ✔ Strong attention to detail when handling emails, phone numbers, addresses, dates, transaction amounts, and reference numbers ✔ 500+ projects completed | 5.0-star rating I understand that this project requires both correction and evidence-based validation. I'll review each spreadsheet row by row, checking contact information for structural validity, verifying transaction dates, amounts, and references against your supplied CSV lookup data, and applying confirmed corrections where the source information supports them. I can process a representative sample first so you can verify my correction methodology, issue logging, and accuracy before I proceed with the remaining spreadsheets. Best regards, Ayan
$15 USD in 40 days
6.7
6.7

Hello, I understand accuracy at this scale isn't realistic through manual review alone — with 1,000 spreadsheets, a repeatable, script-assisted validation process is essential to catch errors consistently without human fatigue creeping in. My approach: Validation Rules: Build structured checks (regex for email format, country code/digit-count validation for phones, address completeness) using VBA/Apps Script for consistency across all files. Transaction Cross-Check: Match dates, amounts, and references against your supplied CSV lookup, flagging mismatches automatically. Correction Workflow: Apply clear, confirmed fixes directly; flag doubtful values in the existing "Issue" column with a concise note. Consolidated Log: Single CSV/XLSX tracking every correction and unresolved issue by sheet name and row reference. Process Integrity: Same folder structure preserved, with a repeatable method ready to scale across the remaining batches. I bring strong experience in large-scale data cleansing using Excel/Sheets scripting, with a careful, systematic approach suited to high-volume accuracy audits. Best regards
$15 USD in 40 days
6.8
6.8

Hi, I can assist you in data validation and correction, which can be a major asset. Over the years, I have honed my skills in Excel and Google Sheets to be able to efficiently deal with large quantities of data while maintaining a high level of accuracy. I'm committed to providing you with well-organized spreadsheets devoid of errors and an insightful summary that catalogs all corrections and unresolved issues for easy reference. By employing me for this undertaking, being detail-focused. Thank You!
$15 USD in 40 days
6.4
6.4

Hello, I am a data accuracy audit specialist who will meticulously review your 1,000 spreadsheets, checking emails (valid structure), phone numbers (country codes/digits), addresses (completeness), and transaction data against your CSV lookup for dates/amounts/references. I will correct obvious errors, highlight doubtful values with notes in your "Issue" column, and deliver cleaned files plus a consolidated log of all corrections/issues. I can use Excel functions, Google Sheets, and Apps Script/VBA for efficiency. I will provide a sample batch of 50 files for your approval before scaling. Please share the folder structure and CSV lookup. I can start immediately. Thank you. Regards, Zafar
$15 USD in 40 days
6.3
6.3

Hi, I can handle the audit of your Excel and Google Sheets files using a combination of Python, Excel validation, and automated checks to ensure accuracy at scale. I’ll validate contact fields, cross-check transaction data against your CSV source, apply confirmed corrections, and flag uncertain cases in the existing Issue column. I’ll also maintain a consolidated correction/issue log with the exact file, sheet, row, and comment. I’m happy to start with a small batch for your spot-check, then scale the same validated process across the remaining spreadsheets. Accuracy, consistency, and a repeatable workflow will be the priority.
$15 USD in 40 days
6.0
6.0

With over 900 projects completed, including some similar to yours, I am the perfect fit to meticulously comb through your 1,000 spreadsheets of customer data. My comprehensive eight years of experience in advanced Excel functions and proficiency in Google Sheets empowers me to easily manipulate and validate your extensive dataset with maximum accuracy. My data analysis skills extend beyond basic proofreading. I can leverage scripting approaches such as VBA or Apps Script for repetitive checks that will massively boost efficiency while maintaining the rigorous standards you need. Moreover, I've worked extensively on data validation and cleansing projects, ensuring you receive a fully corrected dataset alongside a detailed log indicating every correction or unresolved issue. Alongside my expertise in data analytics and spreadsheet management, my clients have always appreciated my commitment to thoroughness, consistent communication throughout projects and reliable deadline management. You'll receive concise yet complete updates from me at every milestone of the project ensuring no alteration goes unnoticed or unrecorded. Trust me to go above and beyond for your project every step of the way!
$15 USD in 40 days
5.6
5.6

I’ll audit and clean the full set of ~1,000 Excel/Google Sheets spreadsheets with a meticulous, accuracy-first workflow. Each row will be validated for contact fields (email structure, phone country codes and digit counts, and address completeness) and for transaction integrity (date, amount, and reference alignment using your provided CSV lookup). To keep results reliable, I’ll apply consistent rules across files, correct clearly wrong values in-place, and for doubtful entries I’ll flag the exact cell and add concise notes in the existing “Issue” column. Deliverables will include (1) cleaned spreadsheets returned with the same folder structure and (2) one consolidated correction log (CSV/XLSX) capturing sheet name, row reference, and a short comment for every update or unresolved issue. Resourcefully calm and repeatable, optimized for accuracy rather than one-off manual review.
$20 USD in 28 days
5.4
5.4

Hi, Validating 1,000 spreadsheets efficiently requires automating structural checks (email format, phone digit count, date consistency) while reserving manual review for ambiguous cases flagged by the script. Your accuracy goal depends on combining regex/validation rules with human judgment for doubtful entries. I’ll build a reusable Apps Script/VBA tool that cross-references transaction data against your CSV lookup, auto-corrects clear errors, and populates the “Issue” column for exceptions. The consolidated log will be generated automatically from this process. Can you provide a sample spreadsheet and the CSV lookup file upfront so I can calibrate the validation rules before processing the full batch?
$15 USD in 40 days
5.2
5.2

Hello, I’d be happy to audit and clean your 1,000 Excel and Google Sheets files. I have extensive experience with Excel, Google Sheets, data validation, Python, VBA, Power Query, and large-scale data cleaning. I will: * Validate emails, phone numbers, addresses, dates, amounts, and transaction references. * Cross-check transactions against your CSV source data. * Correct confirmed errors and flag uncertain values in the existing Issue column. * Maintain the original file structure and naming. * Use automation for repetitive checks and manually review exceptions. * Provide a consolidated CSV/XLSX correction log with file, sheet, row, correction, and comments. I’ll begin with the first batch so you can spot-check the quality before proceeding with the remaining files. I’m ready to start immediately. Best regards.
$15 USD in 70 days
5.1
5.1

Hello, I got that you are looking for a meticulous audit across roughly 1,000 Excel/Google Sheets files, validating contact fields and reconciling transaction data against your CSV source while recording every correction or uncertainty. This is what I can help you with, let's chat. My approach is to use Python with Pandas and validation rules to batch-check email structure, phone formats, addresses, dates, amounts and transaction references against the supplied lookup CSV, rather than relying on manual row-by-row review. Confirmed errors will be corrected, uncertain values flagged in the existing Issue column, and the process structured for repeatable quality checks. As final deliverables you will receive the cleaned spreadsheets in their original folder structure, with confirmed corrections applied, plus one consolidated CSV/XLSX audit log containing file, sheet, row, correction and unresolved-issue details. I’ll first process a sample batch for your spot-check before scaling across the remaining files. One thing I'd like to confirm before we start: should phone and address validation be performed against any external source, or only against formatting and the data you provide? Best Regards, Imran
$15 USD in 40 days
4.8
4.8

Hello There! With around 1,000 spreadsheets, the main challenge is not simply reviewing rows—it is maintaining consistent validation and traceability across a large dataset while avoiding accidental changes to correct information. I can help audit the Excel and Google Sheets data systematically, validating contact fields, checking transaction records against the supplied CSV, correcting confirmed errors, and clearly flagging anything that cannot be verified. My background in data handling, scripting, cybersecurity, and technical auditing allows me to approach this as a repeatable quality-control process rather than relying solely on manual proofreading. I can also maintain the consolidated correction/issue log so every change remains traceable. I’m happy to start with the first batch for validation before proceeding with the remaining files. Best Regards, Roman S.
$20 USD in 40 days
4.6
4.6

Hi, I’ve spent 2 years cleaning and validating large-scale datasets across Excel and Google Sheets, including audits of 500+ files with contact and transaction data. I’m comfortable using Excel formulas, Power Query, VBA and Google Apps Script to automate repetitive checks email validation, phone format verification, address parsing, and cross-referencing against lookup tables which is exactly what you need for 1,000 spreadsheets. My approach: script the bulk validation for speed, then manually review flagged items for accuracy. I’ll return cleaned files in your original structure plus a consolidated issue log with sheet name, row reference and comments. I can also build a reusable validation template for future batches. I’ll start with your first batch, deliver within 2–3 days for spot-checking, then scale to the rest. Kind Regards, Jawad Aziz
$15 USD in 40 days
4.6
4.6

Hi there, I see you're looking to run a data integrity pipeline across 1,000 customer files. The operation involves ingesting each spreadsheet, validating contact data formats, cross-referencing transaction rows against a master CSV, and systematically correcting or flagging discrepancies. The final output is a set of cleaned files and a consolidated audit log. Technical approach: I will build a single script (Python/Pandas or Google Apps Script) to automate this. It will iterate through each sheet, apply regex for email/phone validation, and perform a lookup against your transaction CSV. This creates a highly repeatable and accurate workflow. Core modules: This includes a data validation engine for contact fields, a transaction cross-referencing function, logic for applying corrections or flagging issues, and an automated logger that populates the consolidated report with every action. Relevant systems: We developed an automated sales system that processes lead data from Google Sheets, classifies outcomes, and updates a CRM. This required a very similar data validation, processing, and logging pipeline. I'd begin by scripting the process for a small batch of 5-10 files. Once you approve the results, I can efficiently process the remainder. Regards, Rohit
$15 USD in 10 days
4.7
4.7

Hi — Bravion here from Cleveland. I understand you need a thorough audit of around 1,000 customer spreadsheets to ensure data accuracy across contact details and transaction history. Accuracy and consistency are critical for this kind of project, and I have a clear plan to deliver exactly that. - Extensive experience working with large datasets in Excel and Google Sheets, including data validation, formula-driven checks, and scripting with VBA and Google Apps Script to automate repetitive tasks. - Proven track record of cleaning and verifying contact information such as emails, phone numbers, and addresses, ensuring they meet formatting and completeness standards. - Skilled at cross-referencing transaction data against lookup files to confirm dates, amounts, and references align correctly, flagging or correcting discrepancies as needed. - I will maintain your folder structure and provide a consolidated issue log with detailed comments for transparency and easy review. Could you please clarify the approximate average size of each spreadsheet (rows/columns) and confirm if the CSV lookup file covers all transaction data for every spreadsheet? Also, do you have any preferred tools or scripts you want me to use or avoid? I’m happy to start with a sample batch for your review and adjust the process if needed to ensure quality and efficiency. Looking forward to helping you get this done accurately and on time!
$40 USD in 40 days
4.3
4.3

Greetings, I see you're looking for someone to meticulously proofread around 1,000 customer spreadsheets to ensure data accuracy. This involves checking contact details like emails, phone numbers, and addresses, as well as verifying transaction history against a provided CSV file. My approach would involve a systematic review of each spreadsheet, utilizing Excel and Google Sheets tools to streamline the process while ensuring accuracy. I’ve worked extensively with data management and cleanup, which means I can quickly spot errors and apply corrections effectively. For any questionable entries, I will make sure to highlight them and provide notes in your "Issue" column. The goal is to deliver clean spreadsheets and a consolidated log of all adjustments made, ensuring you have everything you need for your records. Best regards, Muhammad Arshman
$20 USD in 40 days
4.3
4.3

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