Data Tools
Data Tools
Analyze, compare, and explore data files — fast, in your browser.
12 tools available
All Data Tools
CSV Viewer
CSVView CSV files in an interactive sortable and filterable table with column statistics.
CSV to JSON
ConvertConvert CSV files to JSON format — choose between array of objects or array of arrays.
JSON to CSV
ConvertPaste or upload JSON and convert it to CSV with configurable delimiter options.
Excel Reader
ExcelOpen XLS and XLSX files in your browser — view sheets, sort columns, and search data.
Excel to CSV
ConvertConvert Excel spreadsheets to CSV format — select sheets and download instantly.
CSV Diff
CompareCompare two CSV files side by side with color-coded added, removed, and modified rows.
PDF Tools
PDFMerge, split, and compress PDF files directly in your browser. No uploads to external servers.
CSV to SQL
Data ToolsConvert CSV data into SQL INSERT statements for any database.
JSON Flatten
DataFlatten nested JSON to dot-notation paths and unflatten dot-notation back to nested JSON.
File Hash Checker
SecurityUpload a file and compute MD5, SHA-1, SHA-256, and SHA-512 checksums client-side.
CSV to JSONL
ConvertConvert CSV files to JSON Lines format for streaming and batch processing.
SQL to CSV
ConvertParse SQL INSERT statements and convert them to CSV format.
Work With Data Without Installing Anything
Data tools fill the gap between raw files and insights. Whether you need to quickly glance at a CSV without opening Excel, compare two versions of a configuration file, count words in an article, or see how a Markdown document will render — CheckTown's data tools let you do all of this in seconds, directly in your browser.
What Data Tools Are Available?
Our data tool collection includes file viewers (CSV Viewer with sortable columns, Excel Reader for .xlsx files), comparison tools (CSV Diff for comparing two CSV files side-by-side, Text Diff for line-by-line text comparison), and text analysis tools (Word Counter with character, sentence, and paragraph counts).
We also include content tools for developers and writers — the Markdown Preview renders your .md files with full syntax support including tables and code blocks, the Emoji Picker lets you find and copy emoji characters with search, and the Data Format Validator checks JSON, YAML, and XML files for syntax errors.
Frequently Asked Questions
Related Guides
CSV Viewer: Open and Inspect CSV Files Without Excel
You don't need Excel to read CSV files. Learn how to open, inspect, and analyze CSV data in your browser.
CSV to JSON Converter: Transform Tabular Data in One Click
APIs expect JSON, spreadsheets produce CSV. Learn how to convert tabular data to structured JSON instantly.
JSON to CSV: Export Structured Data as a Spreadsheet
JSON data is great for APIs but hard to analyze in spreadsheets. Learn how to flatten and export it as CSV.
Excel Reader: View XLSX Files Directly in Your Browser
No Excel license? No problem. Learn how to open and inspect XLSX spreadsheet files directly in your browser.
Excel to CSV: Convert Spreadsheets to Universal Format
CSV is the universal data exchange format. Learn how to convert Excel spreadsheets to CSV without software.
CSV Diff: Compare Two CSV Files and Find Every Difference
Data pipelines can introduce subtle errors. Learn how to compare two CSV files and surface every change.
PDF Tools: How to Merge, Split & Compress PDFs in Your Browser
Learn how to merge, split, and compress PDF files using client-side tools — no upload required.
CSV to SQL: Convert Spreadsheet Data to Database INSERT Statements
Transform CSV files into SQL CREATE TABLE and INSERT statements with automatic column type detection.
JSON Flatten: Convert Nested to Flat and Back
Flatten nested JSON to dot-notation and unflatten flat paths back to nested objects.
File Hash Checker: Verify File Integrity
Compute MD5, SHA-1, SHA-256, and SHA-512 checksums for any file entirely in your browser.
CSV to JSONL Converter: Create JSON Lines Files
Convert CSV data to JSON Lines format for streaming, BigQuery imports, and machine learning datasets.
SQL to CSV Converter: Extract Data from SQL Dumps
Convert SQL INSERT statements to CSV format. Extract data from database dumps for spreadsheets and analysis.