All your tools, in one place

Simple, free tools to learn, create and play.

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Exam clock and timer

Exam clock with extra time worked out, plus a visual classroom timer with phase sequences.

Anki card generator

Create your cards (formulas, chemistry, code, cloze, images, sounds) and download the .apkg deck.

Spinoo

The random wheel: pick a random name, task or prize.

Image compressorUpdated

Compress and resize photos and PNGs (optimised palette), without uploading them.

Music

Tune, practise, understand theory.

5 tools

Metronome

Odd meters, accents, triplets and swing, polyrhythms, speed trainer and silent bars.

Ear training

Recognise intervals, chords, scales and scale degrees, with song reminders and statistics.

Online tuner

Tune guitar, bass, ukulele, violin… with your mic, or in chromatic mode. Adjustable A440, reference tones.

Fretboard, scales and chords

Bass or guitar fretboard notes, scales, chord diagrams, arpeggios, quiz, and song chord chart transposer.

Bass rhythm trainerUpdated

Play in time: the tool measures your timing through the mic, in milliseconds.

Anki & memory

Create flashcards and study them.

3 tools

Quizlet to Anki

Convert Quizlet sets into an Anki deck (.apkg), for free, with no account and no upload.

Anki card generator

Create your cards (formulas, chemistry, code, cloze, images, sounds) and download the .apkg deck.

Mini-Anki: study your decks

Open an Anki deck (.apkg), a .txt or a .csv and study it online: images, sounds, videos, formulas, spaced repetition.

Education

Exercises, worksheets and classroom tools.

15 tools

Mechanics simulator

Free fall, projectile, inclined plane, pendulum, spring: stroboscopic view, vectors, energies, friction.

Chemistry lab glassware diagrams

Build chemistry set-up diagrams (titration, reflux, distillation…) and export them to LaTeX TikZ, SVG or PNG.

Function grapher

Plots, exact derivative, tangent, integral, zeros and extrema, interpolation (Lagrange, Hermite, splines), TikZ export.

RC, RL, RLC circuitsUpdated

Transient response, oscilloscope, Bode plot, resonance and detailed calculations; LaTeX, SVG, CSV export.

Study planner and Pomodoro

Exam plan with spaced reviews or weekly study slots by subject, Pomodoro timer, calendar export.

Grade average calculator

French bac 2027 and 2026, brevet, university (ECTS) or your own weights: average, honours and target mark.

Timeline creator

Create, illustrate, print and share timelines; exercise mode and student link.

Exam clock and timer

Exam clock with extra time worked out, plus a visual classroom timer with phase sequences.

Virtual optical benchUpdated

Lenses, ray diagrams and lens equation live; magnifier, telescope, microscope, eye, camera; focal length lab with uncertainties; exercises; exact ray tracing (thick lenses, mirrors, prisms, aberrations, dispersion).

MCQ generator

Printable multiple-choice test in several shuffled versions, with answer sheet and a key for each version.

LaTeX assistant

Tables, variation tables, TikZ, trees, matrices and formulas: LaTeX code made easy.

TikZ → SVG

Turn TikZ code (trees, tkz-tab, pgfplots) into a crisp SVG image, ready to paste into WordPress.

Colloscope (oral exam rota)

The weekly oral exam rota of French prep classes: automatic group rotation, A/B weeks, clash detection, PDF and LaTeX.

Multi-class colloscope

Oral exam rota for several classes: mixed groups, subjects on a few weeks, one-by-one orals at fixed times, unavailable slots per student.

Interactive periodic table

All 118 elements with their properties (PubChem): element cards, colour by property, comparison, quiz and printable blank tables.

Artificial intelligence

Prompts, assistants and AI experiments.

2 tools

Prompt builder

62 ready-to-use prompts to fill in, a guided builder with a quality score and a prompt checker.

The prompt guide

Learn to write good prompts: methods, examples, a quiz and ready-to-copy templates.

Sport & outdoors

Running, hiking, cycling, diving, interval training, tournaments, sun and moon.

7 tools

Pace calculator

Pace, speed and race time, splits with a pace band, race prediction and training paces.

Hiking time calculator

Walking time from distance and elevation, GPX track, profile, timings and sunset.

Sun and moon

Sunrise and sunset, twilights, golden hour, day length, moonrise, moonset and moon phase.

Bike gears and tyre pressure

Development and speed for your chainrings, cassette and wheel, and front and rear tyre pressure.

Interval timer

HIIT, Tabata and interval timer: sets, rest, rounds, beeps, voice, full screen.

Tournament generator

Round robin, groups then knockout or single elimination: schedule, scores, standings.

Dive calculatorsUpdated

Nitrox MOD and best mix, PPO2 and EAD, CNS %, air autonomy and SAC rate, dive tables.

Money & work

Salary, budget and everyday calculations, with up-to-date rates.

7 tools