Format Converter for Student

21 format converter tools hand-picked for Student.

Angle Converter

Degrees, radians, gradians, turns, arcminutes, arcseconds and NATO mils, all from one input, copyable, browser-only
Chinese Numeric Converter

Arabic ⇄ Chinese number — simple (一二三), formal (壹貳參), or amount (金额大写 with 元角分).
Chinese Pinyin Converter

Chinese characters to pinyin — with tone marks or numbers, supports simplified and traditional.
Chinese Zodiac Sign Checker (Sheng Xiao)

Chinese zodiac checker — your animal sign, element, compatibility, lucky numbers/colors by birth year.
CSV Transposer

Flip CSV rows and columns from uploaded files or pasted data, with ragged-row handling and local output.
DOI Deduplicator

Find duplicates and keep one clean copy of dois from pasted text or uploaded local files.
DOI Extractor

Extract, dedupe, and export dois from pasted text or uploaded local files.
DOI List Converter

Convert dois from pasted text or uploaded local files.
DOI List Validator

Validate and explain issues in dois from pasted text or uploaded local files.
DOI Normalizer

Normalize, sort, and prepare dois from pasted text or uploaded local files.
Gray Code Converter

Decimal, binary and Gray code three ways, gray = n^(n>>1), one click each side, all in your browser
Lunar Calendar Converter (Chinese Nongli)

Gregorian ⇄ Chinese Lunar (Nongli) calendar — bi-directional, accurate 1900-2100.
Markdown Link Extractor

Upload Markdown and extract inline links, reference links, images, and bare URLs into a local CSV.
Morse Code Translator

Text to Morse code and back — encode, decode, audio playback, ITU standard.
Number to Words

Spell any number in English — cheque amounts, ordinals, British vs American "and" — 100% browser-only
Temperature Converter

One temperature in, all four scales out — Celsius, Fahrenheit, Kelvin, Rankine — live formula, reference points, browser-only
Text File Cleaner

Upload a text file and remove BOM, null bytes, trailing spaces, and excessive final blank lines locally.
Text File Line Ending Converter

Upload or paste text and convert CRLF, CR, and LF endings to a consistent LF or CRLF output locally.
Traditional ⇄ Simplified Chinese Converter

Traditional ⇄ Simplified Chinese — fast, character-level, no API.
Two's Complement Converter

Signed decimal to two's complement binary and hex at 4, 8, 16, 32, 64 bits, with sign-magnitude and one's-complement steps, runs in your browser
Words to Number Converter

Type a number in English or Chinese words, get the digits back — one hundred twenty-three → 123, 一万两千三百 → 12300 — browser-only