Word Origin Dictionary - Online Quick Etymology Lookup
Enter an English word to get a quick etymology. From a curated list of common roots. Learn language history.
UD5 Toolkit
Uncover the fascinating origins of English words — instantly.
Enter an English word to get a quick etymology. From a curated list of common roots. Learn language history.
Type a modern English word and get a possible Old English equivalent. Works offline with a limited but curated wordlist. Learn history.
Enter word pattern with ? for unknown letters and known letters to find matching dictionary words. Essential crossword help. Local dictionary.
Enter hiding places and get a set of rhyming clues to print. Fun for kids' parties.
Build hreflang tags for multi‑language websites. Select languages and URLs and get the complete <link> snippet.
Paste the reference language JSON and a target language JSON. See which keys are missing or extra. Translate with confidence.
Search and browse a comprehensive table of SI units and common imperial conversions. For students and engineers.
Perform simple or regex-based find and replace operations on text. Batch replace words, phrases, or patterns instantly. Processed locally in your browser.
Browse a searchable list of standard HTTP request and response headers with explanations. Quick dev help.
Find the currency code (USD, EUR, JPY) for any country or reverse‑lookup the country from a code. Static reference.
Browse a collection of common bird calls. Play short audio samples to identify birds you hear. Educational static data.
Explore all Intl APIs: NumberFormat, DateTimeFormat, RelativeTimeFormat, ListFormat. See outputs for any locale. Powerful i18n.
Look up any HTTP status code and see its meaning, RFC reference, and example. Full offline reference.
Transform English text into pseudolocalized text with accents, expansion, and brackets. Test your UI's readiness for translation.
Enter any two values (voltage, current, resistance, power) and compute the others. Visual triangle helper and formula display. Instant local calculation.
Set a timer that reminds you to take a break, stretch, or follow the 20‑20‑20 rule. Desktop notification supported. Runs offline.
Select cities and see a 24-hour grid highlighting compatible meeting times. Drag to find a slot that works for everyone. Daylight saving aware.
Paste email headers or body text to quickly spot phishing signs, suspicious domains, and obfuscated links. Educational and private.
Convert normal text into UwU‑ified cuteness with 'w', nyaa, and blushes. Original meme generator.
Calculate the real monetary cost of a meeting by attendees' hourly rates. A humorous yet insightful productivity tool. All local calculation.
Full scientific calculator with history tape, memory keys, and unit conversions. All in your browser, no install.
Need a reason why you are late or the build failed? Get a hilarious, tech‑themed excuse. Pure fun for dev teams.
Calculate the correct series resistor for an LED based on supply voltage, LED forward voltage, and desired current. Circuit diagram shown. Local only.
Enter your must volume and current Brix, TA, and pH to calculate additions of sugar, acid blend, or tannin. Standard winemaking formulas.
Perform gestures on a canvas and see them detected in real time. Logs swipe direction, pinch scale, and rotate angle.
Select species and see ideal humidity range. Set a reminder to mist enclosure. Keep scales healthy.
Record audio directly from your microphone and download it as a WAV file. Perfect for quick notes. No upload, fully offline support.
Compare the real cost of currency exchange including hidden mark-ups and service fees. See how much you lose per transaction. Local educational tool.
Record audio from your microphone and save as WAV file. Visual waveform while recording. Simple and privacy-friendly; audio stays in your browser.
Enter text and see a rough transliteration into Tolkien's Tengwar script. For fans of LOTR. Artistic rendering.