Converters online tools — same implementation for humans and agents · 57 tools
root:converter·Human page + Agent API · same engine
m² hectare mu ft²
si-unit-tables
RFC 4648 Base32 encode and decode
base32-rfc4648
Convert UTF-8 text to/from Base64
std-buffer
URL-safe Base64 (JWT-style)
base64url
Convert camelCase and snake_case
text-utils
Upper, lower, title, and toggle case
text-utils
Convert colors via culori
culori
Header-row CSV to JSON array
csv-lite
Convert B KB MB GB TB
unit-utils
Export DBML to PostgreSQL / MySQL / MSSQL / Oracle via @dbml/core
@dbml/core ModelExporter
Extract plain text from .docx (ZIP + document.xml, no Office suite)
pure-zip
Milliseconds epoch ↔ ISO 8601
Date
Bulk replace text with a regular expression
RegExp
Convert fullwidth and halfwidth characters
text-utils
UTF-8 to/from hex
std-buffer
Convert between HEX and RGB colors
color-hex-rgb
Escape and unescape HTML entities
text-utils
Inspect/encode image Base64 payloads
Buffer
Convert between png/jpeg/webp
sharp
Crop image by left/top/width/height via sharp
sharp
Resize images via sharp
sharp
Bulk-validate ISBN-10/ISBN-13 check digits, suggest the correct one, convert 10↔13
isbn-check-digit
Convert JSON arrays and CSV via Papa Parse
papaparse
JSON array of objects to CSV
json-csv-lite
Sketch TypeScript interfaces from JSON
text-utils
Convert between JSON and TOML via smol-toml
smol-toml
Convert between JSON and XML via fast-xml-parser
fast-xml-parser
Convert between JSON and YAML via js-yaml
js-yaml
m km cm inch ft yd mile
si-unit-tables
Add prefix/suffix to each line
text-utils
Convert solar and lunar dates
lunar-javascript
Convert Markdown to HTML with marked
marked
Markdown → PDF via marked + Playwright Chromium print
marked+playwright
Text ↔ International Morse code
morse-itu
Convert integers between bases 2–36
std-number
Merge PDFs with pdf-lib
pdf-lib
Split PDF page ranges with pdf-lib
pdf-lib
Convert Chinese characters to pinyin via pinyin-pro
pinyin-pro
Parse and serialize URL query strings
URLSearchParams
Reverse a string
text-utils
Chinese uppercase currency amount
nzh-lite
Arabic ↔ Roman numerals converter
roman
ROT13 and configurable Caesar cipher
caesar
m/s km/h mph knots
si-unit-tables
Import SQL DDL to DBML via @dbml/core
@dbml/core importer
Remove HTML tags
text-utils
Celsius Fahrenheit Kelvin
si-unit-tables
Convert UTF-8 text to/from binary bit strings
utf8-bits
Find and replace, optional regex
text-utils
Convert times across timezones with dayjs
dayjs
Text ↔ Unicode escapes / code points
std-unicode
Convert between unix timestamps and ISO dates
std-date
Percent-encode and decode URL components
std-uri
L mL gallon m³
si-unit-tables
kg g lb oz ton
si-unit-tables
Extract first sheet of .xlsx as CSV (ZIP + sheet1.xml, no Excel suite)
pure-zip
OpenCC simplified/traditional/Taiwan/Hong Kong conversion
opencc-js
