19 FREE TOOLS
Check code and data directly in your browser
Format, validate, and convert SQL, JSON, CSV, regex, hashes, and other common development inputs.
BEFORE YOU START
Developer & Data
A small formatting mistake can turn into a long debugging session. These browser-based tools explain supported input and limitations while helping you inspect structure and conversion results without storing the source on Baro Tool servers.
- Inspect SQL and JSON structure
- Convert CSV, JSON, and timestamps
- Test regex, hashes, and encoding
TOOLS
Choose a Developer & Data tool
Bulk URL Opener
Tidy a collection of reference links before opening the pages you need.
Open tool →Online HTML Editor
Turn an announcement into a document with headings, tables and links, then export its HTML.
Open tool →Unicode Converter & Inspector
Inspect invisible spaces and find the character codes behind text or emoji.
Open tool →Cron Generator & Explainer
Build a cron expression and check that its upcoming times match your plan.
Open tool →IP & Subnet Calculator
Use an IP address and prefix to find its network range and address count.
Open tool →SQL Syntax Checker
Check whether SQL parses in the selected dialect before you run it.
Open tool →CSV to Excel Converter
Check text encoding and columns before saving a CSV as a real Excel workbook.
Open tool →JSON ↔ CSV Converter
Turn an array of JSON objects into a table, or move CSV rows into JSON.
Open tool →Regular Expression Tester
See what a JavaScript regular expression matches and how its replacement changes text.
Open tool →Unix Timestamp Converter
Read a Unix value from a log as a date, or convert local date and time into timestamps.
Open tool →Live Markdown Editor
Write a short Markdown note and check its headings and lists as you type.
Open tool →SQL Formatter
Break long SQL into readable clauses and column lists while preserving quoted values and comments.
Open tool →JSON Formatter & Validator
Expand compact JSON with indentation or see why an input cannot be parsed as JSON.
Open tool →Privacy Data Masker
Partially mask email addresses, Korean mobile numbers, resident-ID patterns, and 16-digit card-shaped numbers in text.
Open tool →CSV Cleaner
Trim cell edges and remove empty rows from comma-separated CSV, then write values back with quotes where needed.
Open tool →INSERT SQL Generator
Convert CSV or a table pasted from Excel into INSERT statements, with control over leading zeros, value types, and empty cells.
Open tool →SEO Meta Tag Generator
Preview a page title and description, then generate metadata, social-sharing tags, and one FAQ entry.
Open tool →URL & Base64 Encoder
Percent-encode a URL component or convert text to Base64, then decode it to check the original.
Open tool →Secure Password Generator
Choose a length and character pool to generate random password suggestions, then click one to copy it.
Open tool →PRACTICAL GUIDES
Understand the calculation before using it
How to Test Regex Matches, Capture Groups, and Replacements
Enter JavaScript patterns and flags to inspect match positions, capture groups, and replacement output.
Read guide →4 min readHow to Convert Unix Seconds, Milliseconds, UTC, and Local Time
Distinguish ten-digit seconds from thirteen-digit milliseconds and compare local and UTC displays.
Read guide →4 min readHow to Convert JSON and CSV without Breaking the Data
Handle object arrays, headers, commas, quotes, line breaks, and nested values during JSON↔CSV conversion.
Read guide →