Timbrica Online Tools — Page 9

Turn any text into a fill-in-the-blanks exercise. Choose how words are removed, do it on screen or print a worksheet with an answer key. Free, in the browser.

A searchable list of 100+ English phrasal verbs with meanings and examples, filterable by particle and CEFR level, plus a fill-in trainer. Free, in the browser.

A searchable table of 130+ English irregular verbs grouped by pattern, plus a typing trainer for the past simple and past participle. Free, in the browser.

Loop and slow down any audio or video, record yourself shadowing it, and compare your waveform and pitch side by side. Free, in the browser.

Convert any English score between CEFR, IELTS, TOEFL, Cambridge and Duolingo, and calculate your IELTS overall band. Free, in the browser.

Look up an English word and see its natural collocations — the verbs and adjectives that go with it — grouped by pattern with examples. Free, in the browser.

Practise IELTS Speaking with a Part 2 cue-card timer (1 minute prep, 2 minute talk), random cue cards and Part 1 & 3 question banks. Free, in the browser.

Say an English vowel and see it plotted on a formant chart against native targets. Real-time F1/F2 feedback for clearer pronunciation. Free, in the browser.

Browse and quiz English false friends — words that look like a word in your language but mean something different. Russian, German, Spanish, French, Portuguese. Free.

Count the syllables in any English word or text. Dictionary-accurate, with a poetry mode for haiku. Free, in your browser.

Real-time positions of the Sun, Moon, planets and constellations. Milky Way band, meteors, satellites — auto-updates every 5 minutes. Free.

Build silly faces in your browser. Mix doodle eyes, noses, mouths, hats and roll the dice for random combinations. Print, save, share. Free.

Online tarot with the Rider-Waite-Smith deck: 6 spreads, upright and reversed meanings, voice reading and a journal. Free.

A free falling-sand game in your browser. Drop sand, pour water, light fires and watch 14 elements react in a live physics sandbox.

Pop endless virtual bubble wrap online for a quick, satisfying stress break. Realistic pop sound, calm mode, themes, and a pop counter. Free.

Register any robot and get a free unique Timbrica Robot ID (TRID), a public passport page and a lifecycle logbook. Free, open registry.

Calculate gear ratio, output RPM and torque for multi-stage gear trains. Robotics, RC, mechanisms. Free.

Calculate ISO 13855 minimum protective separation distance for collaborative robots. Enter K, Tr, Ts, and C to get S instantly. Free.

Tune PID controller gains interactively. Step-response plot, live metrics, Ziegler–Nichols auto-tune, presets. Free.

Generate printable line-follower and micromouse tracks for robotics competitions. Random loop, maze, figure-8. Export to print. Free.

Calculate LiPo pack voltage, energy, max discharge current and flight runtime for drones, RC cars and robots. Free.

Convert quaternions, Euler angles, axis-angle and rotation matrices online. All Euler orders, intrinsic/extrinsic, gimbal-lock handling. Free.

Calculate wheeled robot linear speed, odometry ticks/m and distance/tick from wheel diameter, RPM, gear ratio and encoder CPR. Free.

Calculate the required holding torque for a robot arm servo. Enter payload, lever length and safety factor — get kg·cm, oz·in and N·m instantly. Free.

Calculate steps/mm, microstepping, and step frequency for 3D printers, CNC machines, and robotics. Belt, leadscrew, and rotary modes. Free.

Look up error codes for Roomba, Roborock, Ecovacs, Dreame, Xiaomi, Eufy, Shark, Neato, Narwal & Roidmi robot vacuums. Cause and fix steps. Free.

Browser-based serial monitor for Arduino, ESP32, and microcontrollers. Live console, telemetry plotter, TX/RX. Free.

Open and inspect URDF robot description files in 3D. Parse links, joints, STL meshes and articulate the kinematic chain. Free.

Interactive DH-parameter robot arm visualizer. Chain joints, move sliders, see the end-effector pose live in 3D. Free.

Add your signature to a PDF online: draw, type or upload it, drop it on the page, add the date and download the signed file. In your browser. Free.

Check whether a signed PDF has been altered. Upload the PDF and its verification seal to confirm the file is unchanged. In your browser. Free.

Rearrange or remove pages of a PDF with a drag-and-drop visual editor. Preserves bookmarks and page labels. Browser-only, free.

Decode and inspect JSON Web Tokens in the browser. Header, payload, expiry, claims explained. No signing. Free.

Encode and decode URL strings in the browser. Component vs full-URL mode, + for space, auto-detect. Free.

Generate UUID v4 (random), v7 (time-ordered), v1 (timestamp) or Nil UUIDs in your browser. Bulk, formatted, validated. Free.

Calculate MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 hashes for text or files in your browser. HMAC, hex or base64.

Encode and decode Base64 in the browser. UTF-8 safe, URL-safe variant, file uploads. Auto-detect direction. Free.

Test JavaScript regular expressions in the browser. Highlight matches, see groups, preview replacement. Free.

Type your profession to see automation risk for 2026 — composite score from Anthropic Economic Index, BLS projections, PayScope and O*NET data.

Find your watch strap size: measure the lug width in mm. Printable 1:1 lug-width gauge plus a calibrated screen ruler. Free.