Converters Tools
Base, color, chmod, case and unit converters — quick one-off conversions with no server round-trip.
CSV to JSON
Convert CSV to JSON online for free. Header-based mapping, quoted fields and type detection — instant conversion in your browser.
JSON to CSV Converter
Convert JSON arrays to CSV online — nested objects flattened automatically, paste or drop JSON and download the CSV. No upload.
Excel to JSON
Convert Excel to JSON online — drop an .xlsx or .csv file, pick a sheet and get structured JSON rows. Files never leave your browser.
JSON to SQL Converter
Convert JSON or CSV to SQL INSERT statements online — CREATE TABLE with inferred column types, MySQL/PostgreSQL/SQLite/SQL Server/Oracle dialects. Reverse: parse INSERTs back to JSON.
Markdown to HTML Converter
Convert Markdown to clean HTML online for free. Sanitized output, optional full document wrapper, GFM tables and code blocks — copy or download the .html file.
Timestamp Converter
Convert Unix timestamps to readable dates and back online for free. Seconds and milliseconds, local and UTC output, live epoch clock — all in your browser.
Timezone Converter
Convert times between timezones online for free. See a wall-clock time rendered in 20 common zones plus Unix/ISO output — powered by the Intl API.
Integer Base Converter
Convert integers between binary, octal, decimal and hexadecimal online for free. Supports 0x/0b/0o prefixes, negative values and arbitrarily big numbers.
Color Converter
Convert colors between HEX, RGB and HSL online for free. Native color picker, live swatch and WCAG contrast ratios against black and white.
TOML Converter
Convert TOML to JSON and back online for free. Parse and serialize TOML configs — pyproject.toml, Cargo.toml — locally in your browser.
.env Converter
Convert .env files to JSON or YAML and back online for free. Handles quotes, comments and multiline escapes — perfect for config migrations.
Chmod Calculator
Unix chmod calculator online — convert file permissions between the rwx checkbox matrix, octal notation (755) and symbolic form (u=rwx).
cURL to Code Converter
Convert cURL commands to code online — turn any curl command into fetch, axios, Python requests, Go, PHP or Rust code. Free, runs in your browser.