Teacher

Exam Clock & Session Timer

Classroom-grade countdown built for invigilators, teachers, lecturers, and event runners. Three shapes in one tool. (1) A single exam clock — pick 30 min / 45 min / 1 hr / 1 hr 30 / 2 hr / 3 hr or set custom hours + minutes. (2) A multi-segment timer — e.g. reading time then writing time, with a distinct chime between segments (UK / Cambridge style). (3) A repeating rotation — set the sessions ONCE then repeat them N times. Built specifically for parent-teacher interview night (8 min interview + 2 min changeover, repeat 15 times), Pomodoro work-break cycles (25 + 5, repeat 4), classroom station rotations, group activity timers, speed dating, pitch competitions. Each session has its own chime style (soft tone, crisp ding, two-tone bell, triple beep, gentle chime, or silent) so the teacher can tell by ear which segment just ended — no need to look at the projector. Warning thresholds at 10 / 5 / 1 minutes fire colour shifts (ink to amber to orange to red) plus their own warning chimes — and they only fire on sessions long enough to make them useful, so an 8-minute interview doesn't get a '10 minute' warning. Fullscreen overlay covers all site chrome for a projector-clean view. 'Start in fullscreen' toggle for one-click setup. Pause / resume / skip-session / reset controls. Keyboard: Space pauses, R resets, F fullscreens, N skips the current session. Settings save locally so reload doesn't wipe your setup mid-event. No login, no ads, no theme picker, no loop counter clutter — just the timer.

Random Name Picker

Fair student selection for the classroom — type or paste a roster (one name per line), hit pick, watch the name cycle through and settle on the chosen one. Two modes: 'no repeats until everyone is picked' (the fair mode every teacher actually wants — once you've drawn the whole class, the round resets) or 'allow repeats' (each pick is independent). Picked names are tracked in a recent-history strip so you can see who's been called. Roster + history save locally so the same class list is there next period. Optional: remove a picked name from the roster on the spot. No signup, no ads, no spinner-wheel gimmicks — just the picker.

Countdown Timer

Set a countdown timer with custom duration.

Stopwatch

Precise stopwatch with lap tracking.

Pomodoro Timer

Focus timer with work sessions and break intervals.

Interval Timer

HIIT, Tabata, EMOM, AMRAP — with voice cues, audible bells, and a screen that stays on.

GPA Calculator

Calculate your GPA with multiple courses and credits.

Percentage Calculator

Calculate percentages, increases, decreases, and changes.

Flashcard Maker

Create flashcards manually or generate a deck with AI from a topic. Study mode flips cards, tracks what you know, and shuffles the remainder.

Word Counter

Live word, character, sentence, paragraph, unique-word and reading-time counts. All on-device.

AI Lesson Plan

Drafts a classroom-ready lesson plan in seconds. Type the topic (e.g. 'Introducing photosynthesis' or 'Romeo and Juliet Act 1'), pick the year level (primary / middle / secondary / tertiary / adult), duration (30 / 45 / 60 / 90 / 120 min), and teaching style (direct instruction / inquiry / activity-led / collaborative / flipped). Returns a structured plan with: learning outcomes (Bloom-aware), prior knowledge, materials list, a MINUTE-BY-MINUTE lesson sequence that sums to your duration, differentiation (named scaffolds + extension, not 'scaffold appropriately'), formative + summative assessment, and homework. Optional class context and resource list keep the output realistic. No invented curriculum codes, no padding, no platitudes — concrete teacher actions + concrete student actions.

Explain Like I'm 5

Simplify complex text to any reading level using AI.

AI Summarizer

Summarize any text into key points using AI.

AI Paraphraser

Rewrite text in different words while keeping meaning.

Reading Level Analyzer

Check the reading difficulty and grade level of any text.

Citation Generator

Generate APA, MLA, Chicago, and Harvard citations.

AI Grammar Checker

Fix grammar, spelling, and punctuation with AI.

AI Tone Changer

Rewrite text in a different tone or mood.

Diff Checker

Compare two texts and highlight differences.

Markdown to PDF

Convert Markdown to PDF with proper formatting. Code blocks, lists, quotes, headings. Free online tool.

Word to PDF

Convert Word documents (.docx) to PDF. Text, headings, lists, and tables preserved. Free online tool.

PDF Merge

Combine multiple PDF files into one document.

PDF Watermark

Add a text or image watermark to every page of a PDF.

Image to PDF

Combine multiple images into a single PDF — drag to reorder.