Your CSV Toolkit Reimagined
Process, analyze, and transform your data with 50+ powerful tools. Built for CSV Haters who demand speed, privacy, and zero installation.
Trending Tools
Broken Format Converter
Fix the mess when your CSV export breaks. Convert between broken Excel files (XLS, XLSX), malformed JSON, corrupted CSV, and busted TSV formats because nothing ever works the first time. Handle the encoding disasters and delimiter chaos that plague every data export.
VLOOKUP Never Works
Attempt SQL-style joins or VLOOKUP between two incompatible files when keys never match.
Remove Duplicate Disasters
Remove duplicates that break everything based on specific columns because your data is full of redundant garbage.
Broken Forecasting Tool
Attempt to forecast future disasters using broken historical data.
Broken Format Converter
Fix the mess when your CSV export breaks. Convert between broken Excel files (XLS, XLSX), malformed JSON, corrupted CSV, and busted TSV formats because nothing ever works the first time. Handle the encoding disasters and delimiter chaos that plague every data export.
CSV to Excel Fix
Stop Excel from destroying your CSV files. Convert broken CSV to XLSX while fixing the encoding disasters, formatting nightmares, and data type failures that make Excel unusable. Because opening CSV in Excel always breaks everything.
Extract Data Trapped in PDF
Free your data trapped in PDF hell. Extract tables from locked PDF documents because someone thought PDFs were a good format for data sharing.
CSV to Broken JSON
Convert flat CSV rows into JSON when your API demands it but your data is a mess.
TSV to CSV Mess
Convert Tab-Separated nightmares to Comma-Separated disasters when systems can't agree on delimiters. Fix broken TSV files that fail to import anywhere because tabs are invisible and break everything.
CSV to TSV Nightmare
Convert comma disasters to tab disasters when systems demand the wrong delimiter. Export data to systems that inexplicably require tabs, handle scientific data that breaks with commas, or deal with bioinformatics tools that hate CSV.
XLSM to CSV Converter
Convert Excel Macro-Enabled Workbook (XLSM) files to CSV format. Extract data from XLSM spreadsheets while preserving data integrity. Perfect for processing macro-enabled Excel files, automating data pipelines, and converting complex workbooks to simple CSV format.
CSV to XLSM Converter
Convert CSV files to Excel Macro-Enabled Workbook (XLSM) format. Create XLSM files from CSV data for use with VBA macros and automated Excel workflows. Secure, fast, and browser-based conversion without uploading to external servers.
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Have an idea for Conversion & Export?
Submit IdeaFix Completely Broken CSV
Emergency surgery for CSV files that are completely broken with mangled encoding and catastrophic structural failure.
Fast CSV Damage Control
Quick fix for the usual CSV disasters with one painful click.
Hidden Character Hell Fixer
Remove invisible zero-width garbage and non-breaking spaces that silently destroy your code and break everything.
Merge Multiple Broken CSVs
Combine dozens of inconsistent CSV files because someone split your data into a nightmare of incompatible pieces.
Filter Broken CSV Data
Query your broken CSV like a database because Excel filters are useless for real work.
Remove Common CSV Garbage
Remove whitespace disasters, empty row nightmares, and duplicate hell.
Fill Empty Cells That Break Everything
Fix missing values that break imports using interpolation because null values destroy everything.
Fix Terrible Column Names
Bulk rename headers with spaces and special characters to snake_case because databases hate human-readable names.
Remove Duplicate Disasters
Remove duplicates that break everything based on specific columns because your data is full of redundant garbage.
Find Similar Broken Records
Find and merge nearly-identical records that differ by typos (e.g. "Jon Doe" vs "John Doe") because data entry is always inconsistent.
Audit How Broken Your Data Is
Audit your broken dataset to see how many nulls, errors, and type mismatches are destroying your analysis.
Fix Inconsistent Date Disasters
Standardize date chaos into ISO-8601 because dates are always in 47 different formats.
Extract Unique Rows from Mess
Filter and export only unique values from a list full of duplicates.
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Have an idea for Cleaning & Preparation?
Submit IdeaMake Charts from Messy CSV
Create bar, line, and scatter charts from your broken CSV data because visualizing disasters is still useful.
Excel Chart Extractor
Extract embedded charts from Excel files and recreate them as interactive visualizations.
Online Pivot Disaster
Summarize broken data like in Excel but without Excel crashing every 5 minutes.
Calculate Stats on Broken Data
Calculate Mean, Median, Mode, and Standard Deviation on your disaster data.
Automated Disaster Report
Generate a full report showing how broken your data quality is with one painful click.
Group and Aggregate Mess
Group broken rows by category and calculate sums or averages when nothing adds up correctly.
Query Disaster CSV
Run SQL queries directly on your broken CSV files because flat files suck for analysis.
Find Relationships in Broken Data
Find relationships between variables using Pearson Correlation even when your data is a mess.
Count Broken Values
Count frequency of unique values in a broken column.
Compare Two Broken CSVs
Find differences (added/removed rows) between two CSV disasters because versions never match.
Guess Data Types from Mess
Try to infer data types and structure for SQL CREATE TABLE when everything is stored as text.
Profile Broken Text Data
Analyze word frequency and text length in your broken text columns.
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Have an idea for Analysis & Visualization?
Submit IdeaForce Convert Data Types
Force broken columns to Numbers, Dates, or Text because type detection always fails.
Compress Bloated Files
Compress bloated CSV and XLSX files because they're always too large to email.
Calculated Column Disasters
Apply broken math formulas (A + B) to create new columns that might work.
VLOOKUP Never Works
Attempt SQL-style joins or VLOOKUP between two incompatible files when keys never match.
Join When Nothing Matches
Join broken tables even when spelling never matches because data entry is always inconsistent.
Moving Averages
Smooth out volatile data using rolling windows.
Extract Emails from Mess
Scrape email addresses from text files or broken CSV columns.
Unpivot Wide Disasters
Transform painful wide data (months as columns) into long format because Excel reports are always wrong.
Split Broken Dates
Extract Day, Month, Year, and Weekday from broken dates that should have been separate columns.
Extract from Broken Text
Count words, characters, and extract patterns from messy text columns.
Regex Pattern Nightmare
Use painful Regular Expressions to extract complex patterns because nothing is ever simple.
Rename Broken Categories
Rename or group inconsistent values (e.g., US vs USA vs U.S.A.) because data is never standardized.
Check Broken Logic Rules
Check if broken data meets specific logical rules (spoiler: it never does).
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Have an idea for Transformation & Logic?
Submit IdeaAsk AI About Your Mess
Ask AI questions about your broken data and hope it understands the chaos.
AI Data Transformer
Transform and edit your CSV using natural language commands. AI converts your instructions into code and applies changes instantly.
Broken Forecasting Tool
Attempt to forecast future disasters using broken historical data.
K-Means Grouping Hell
Automatically group similar broken data points that shouldn't be together.
Linear Regression Hell
Model the relationship between two variables that don't actually relate.
Find Data Anomalies
Find broken data points that don't fit the pattern using Z-Score because outliers break everything.
Fix Outlier Disasters
Cap, remove, or flag anomalies that destroy your dataset statistics.
Data Normalization Disaster
Scale broken numbers to 0-1 range or standardize them when nothing is standardized.
One-Hot Encoding Disaster
Convert categorical text disasters into binary numbers for ML because machines hate text.
Group Numbers into Broken Buckets
Group continuous numbers into arbitrary buckets (e.g. Age groups) because granularity is painful.
Rolling Statistics Disaster
Smooth out volatile broken data using rolling windows that don't fix anything.
Fill Missing by Group Hell
Fill missing values based on broken group averages because individual values are unknown.
What-If Disaster Builder
Create "What-if" scenarios by modifying variables that never predict reality.
Generate Fake Data
Generate synthetic fake data samples to expand tiny broken datasets.
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Have an idea for AI & Machine Learning?
Submit IdeaShopify Tools
Complete Shopify toolkit: bulk product editor, multi-store inventory sync, profit calculator, dynamic pricing engine, order anomaly detection, and customer segmentation. Optimize your store operations, prevent overselling, maximize profits, and identify your best customers - all with CSV-based workflows.
Ads Tools
Complete marketing agency toolkit: multi-platform campaign aggregation (Google Ads, Facebook, LinkedIn), ROI calculator per client, white-label report generator, keyword gap analysis, competitor ad tracking, and AI-powered budget allocation optimizer. Manage 10-100 clients efficiently with unified analytics.
HR Tools
Complete HR and recruitment toolkit: resume parser with skill scoring, candidate deduplication using fuzzy matching, salary benchmarking against market rates, diversity & inclusion analytics, interview scheduler optimizer, and automated onboarding checklist generator. Streamline hiring from application to onboarding.
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Have an idea for Platforms?
Submit IdeaWhy IHateCSV?
Excel crashes on large files. Spreadsheets corrupt your formatting. Desktop software requires installation and updates. We built IHateCSV to solve these problems—process CSV and Excel files directly in your browser with enterprise-grade tools, zero installation, and complete privacy.
Lightning Fast
Process millions of rows in seconds with optimized web workers
Privacy First
Your data never leaves your browser—all processing is client-side
Purpose Built
50+ specialized tools designed for real-world data challenges
Featured Guides
Common Questions
Why should I trust this tool with my data?
Is this really free?
Why does this exist?
Can I use this for huge files?
Do I need to install anything?
What file formats are supported?
How do I handle special characters and encoding issues?
Can I automate repetitive tasks?
What browsers are officially supported?
How do I report bugs or request features?
Data Processing Best Practices
Data Quality Guidelines
- •Always backup original files before applying transformations—browser refreshes lose unsaved work
- •Validate encoding early—corrupted special characters (ã→à) indicate encoding mismatches
- •Test on subsets first—verify operations on 1000 rows before processing millions
- •Document your workflow—maintain logs of operations applied for reproducibility and auditing
- •Spot-check random samples—automated validation can miss edge cases in large datasets
Performance Optimization Tips
- •Close unnecessary tabs—free RAM for large file processing (8GB+ recommended)
- •Use Chrome or Edge—best JavaScript performance and Web Worker support
- •Disable real-time preview—for files exceeding 5 million rows to improve responsiveness
- •Process in batches—split 50GB files into 5GB chunks for better stability
- •Monitor system resources—check Task Manager/Activity Monitor for memory constraints
Common Data Problems We Solve
Problem: Excel Corrupts My Data with Auto-Formatting
Scenario: ZIP codes lose leading zeros (02134→2134), dates appear as numbers (44562 instead of Jan 15 2022), credit card numbers convert to scientific notation (1.23E+15).
Why it happens: Excel aggressively auto-formats data based on content patterns, overriding your original values without warning.
Solution: Load your files here—our platform preserves original data types without any auto-formatting. Use the Data Type tool to force specific column types if needed.
Problem: Files Too Large for Excel (1M+ Rows)
Scenario: Excel hard-limits at 1,048,576 rows. Files exceeding 100MB become unstable, frequently crash, or refuse to open.
Why it happens: Excel loads entire files into memory with inefficient storage format. Single-threaded architecture cannot handle modern datasets.
Solution: Our tools handle files up to 10GB+ using streaming algorithms and Web Workers. Process 10M+ row datasets without crashes.
Problem: Duplicate Records in Customer/Product Data
Scenario: Database exports contain duplicate entries due to data entry errors, system glitches, or multiple data sources merging.
Why it happens: Manual data entry, lack of database constraints, CRM integrations creating redundant records.
Solution: Use our Dedupe tool with configurable matching rules—exact match, fuzzy matching for typos, or custom column combinations.
Problem: Encoding Issues with International Characters
Scenario: Special characters display as gibberish (São Paulo → São Paulo, München → München) when opening CSV files.
Why it happens: File saved in one encoding (Windows-1252) but opened with another (UTF-8), causing character misinterpretation.
Solution: Use our Encoding Converter tool which auto-detects and fixes encoding mismatches. Export with UTF-8 BOM for Excel compatibility.
Problem: Merging Data from Multiple Sources
Scenario: Need to combine customer data from CRM with transaction data from payment processor, matching by email or customer ID.
Why it happens: Systems don't natively integrate; data exists in separate silos requiring manual reconciliation.
Solution: Use our Join tool supporting inner/left/right/outer joins like SQL, with fuzzy matching for imperfect data.
Quick Tool Selection Guide
Data Cleaning Scenarios
- Remove duplicates:Dedupe Tool (exact or fuzzy matching)
- Fix encoding:Encoding Converter (UTF-8, Windows-1252, etc.)
- Fill blank cells:Fill Missing Tool (forward fill, backward fill, interpolation)
- Standardize formats:Cleaning Tool (trim whitespace, fix cases, remove special chars)
- Detect anomalies:Auto-Fix Tool (AI-powered error detection and repair)
Data Transformation Scenarios
- Convert formats:Conversion Tool (CSV↔Excel↔JSON↔SQL)
- Reshape data:Pivot/Unpivot Tool (wide to long format conversion)
- Combine files:Join Tool (SQL-like joins on common columns)
- Add calculations:Formula Tool (Excel-like formulas or SQL queries)
- Filter rows:Filtering Tool (complex AND/OR conditions)