Tools that open in mainland China
322 tools, all reachable directly, all usable without an account.
Microsoft's math solver that reads problems from a photo
Generate fake data by field rules and export JSON, CSV or SQL
A minimal typing speed test with many themes, no login to start
NASA's official free 3D models of spacecraft and planets
A NASA 3D tour of the solar system that flies you to any planet
NASA's full image and video archive, searchable by mission
Build a computer from logic gates in a level-by-level hardware course
Turn text or documents into voiceovers without registering
Upload documents and listen, with natural voices in many languages
Free OCR in many languages with unlimited image-to-text runs
AI summaries of videos and documents that can become mind maps
Erase objects and text from photos with no signup or usage limit
Over 3000 categorized calculators, each with formulas and explanations
Test microphone input levels online and record to compare playback
Batch merge PDFs and set page layout, free export without signup
Convert images to text without signup, many languages supported
Free cultural media: courses, audiobooks and films
An open emoji library with SVG and PNG downloads
Global data visualizations from an Oxford team, charts fully open
A veteran online PDF editor and form filler that works without signup
