Spell check
Powered by Hunspell dictionaries — the same tech behind LibreOffice, Firefox, and Thunderbird.
Privacy mode is default — your text is checked entirely inside your browser (Python + Hunspell running locally), never sent to our servers. Toggle to Server mode if you want the full 49-language coverage or need to skip the ~13 MB one-time runtime download. Save for offline (once) makes Privacy mode work with no internet at all.
Long-form ready. Paste a 100-page document (up to 500,000 characters) — Whisk processes the whole thing in seconds, deterministically. No AI truncation, no context-window limit.
Ask (verified knowledge)
Chatbot experience, zero AI. Every fact comes from the Whisk Encyclopedia's source-attributed knowledge graph; every sentence is derived — not generated. No hallucinations. If the encyclopedia doesn't have it, Whisk says so rather than making it up.
A dedicated Whisk Ask experience with sample queries and a mind map lives at /whisk/ask/.
More text tools (v0.7.2 · non-LLM · deterministic)
Translate, paraphrase, spot clichés, check terminology consistency, disambiguate homographs, detect languages — all on our VPS, no third-party API. If DeepL / Google / Grammarly disappear tomorrow, none of this stops working.
Flags inconsistent variant spellings within the same manuscript — email vs e-mail, JavaScript vs Javascript, US vs UK spellings.
Same spelling, multiple meanings. lead the team vs lead pipe. Whisk uses spaCy POS + WordNet + Lesk WSD to disambiguate every occurrence.
176-language ID via fastText lid.176 (Facebook Research), bundled on our VPS — no external API call. Deterministic.
Our promise
- We never see it. Privacy mode is the default — your text is checked inside your browser, bytes never leave your device. Switch to Server mode if you want backend compute. Click Save for offline once and Privacy mode works with no internet at all.
- 60-second server TTL. No logs of input or output content. Anonymous timing metrics only.
- Learns you, not about you. Ignore a word 3 times and it's added to your personal dictionary — locally, forever. Pick a favourite suggestion and it stays your favourite — locally, forever. Nothing about you syncs anywhere.
- Free client SDKs.
rlbwhisk(Python) and@rlbwhisk/client(JS) are MIT-licensed. Build anything on our API for free.