KnoWeave Tools

Free, no-signup online tools. Processing happens in your browser — files never leave your device.

📄 Documents & Text3

Chinese Converter Simplified/Traditional Chinese conversion based on the Wikipedia phrase table, with Taiwan / Hong Kong / Mainland vocabulary. PDF Toolkit Merge, split, organize, convert, watermark and more — everything processed locally in your browser. OmniNotation Chrome extension for web highlighting, notes and bookmarks — data stays on your machine by default.

🖼️ Images3

Image Compressor TinyPNG-style compression for PNG / JPEG / WebP, batch-friendly and fully local. Image Converter Convert among PNG / JPEG / WebP / BMP / GIF / SVG / AVIF / TIFF / ICO / APNG, all in the browser. GIF Optimizer Shrink GIFs with inter-frame diffing, palette reduction, scaling and frame thinning — locally.

🎙️ Audio2

Text to Speech Read text aloud with your browser's system voices; speed, pitch and volume adjustable. Speech to Text Dictate to your browser — continuous recognition, spoken punctuation, export to txt/Word.

🧰 Developer & Webmaster5

URL Encoder Live URL encoding/decoding in standard and form modes, with UTF-8 byte stats. Cron Generator Visual 5-field cron builder with live validation and next-run preview in your timezone. robots.txt Checker Fetch and analyze any site's robots.txt: directives, path decisions and SEO health check. Emoji Table All 3,781 Unicode 16.0 emoji with code points, UTF-8 and HTML entities — searchable. ASCII Art Turn text into ASCII banners and images into character art, fully offline.

🧮 Daily Calculators9

Almanac Calendar Solar-lunar calendar with solar terms, holidays, traditional almanac and hour fortunes. World Time Diff Compare any two cities in real time, with DST handling and a world clock wall. ID Card Lookup Parse a Chinese ID number locally: region, birth date, gender, zodiac and checksum. Birthday Toolkit Birthday parsing, four-pillar chart, zodiac lookup — one screen, updated live. Loan Calculator Loan, mortgage, prepayment and installment IRR calculators with full schedules. Car Insurance Calc Estimate premiums for compulsory and commercial auto insurance by region rates. Litigation Fee Calc Court acceptance, enforcement and preservation fees by China's fee schedule. Tax & Social Insurance Cumulative-withholding income tax plus full social insurance breakdowns. Unit Converter 212 units across 14 categories — length, mass, temperature, data, pressure and more.

🌐 Network2

IP Lookup Check any IP's location, ISP and ASN, with IPv6 support; your IP shown on load. Speed Test Browser-based download / upload / latency / jitter test via Cloudflare endpoints.