Online Tools for Students
91 toolsFor school and university students: solve an equation with the working and plot a graph, prepare for an English exam, transcribe a lecture, turn a scanned textbook into a PDF, write and check an essay, translate an article and stay focused while studying.
Education
6 more in this category →Step-by-step equation solving
Solve equations, inequalities and systems step by step: discriminant, Vieta, domain, sign chart and a substitution check. Works from a photo.
Function graphing calculator
Graph any function and get its zeros, extrema, asymptotes and intersections as numbers. Sliders for parameters, table of values, PNG and link.
Mind map
Build a mind map from the keyboard, or paste a list and get a map. Share it as a link with no account; export PNG, PDF, Markdown, OPML.
Schulte Tables
Find the numbers in order without moving your eyes from the center. A series of five grids gives you work efficiency, warm-up and stability.
Speed Reading Trainer
Read one word at a time with an eye anchor, in chunks or by sentence — and measure how many words per minute you actually read.
AI presentation maker for lessons
AI builds a lesson presentation from your topic: slides, lesson plan, handout and a narrated video. PowerPoint export with speaker notes.
Graph paper
Grid, millimeter, dots, isometric, staves and handwriting guides as PDF with exact millimeters and a printer calibration.
Periodic table
The periodic system, the solubility chart, the activity series of metals and a molar mass calculator on one page, with data from PubChem.
True Size of Countries
Drag any country across the map and see its real size: Mercator stops inflating it. Compare countries, states and regions by true area.
Blank Maps to Fill In
Fill in a blank outline map on a phone or computer and print it
World Alphabets
Interactive alphabet guide for 12 languages. Click any letter to hear its pronunciation. Learn mode + quiz mode.
EGE Score Calculator
Converts primary points to test scores using the official scales and helps you grade a mock exam by task and by the official FIPI criteria — the way an examiner does.
Algebra test
Adaptive algebra diagnostic for grades 5–11: shows which topics are mastered, where the gaps are, and what to study first.
Typing Trainer
Free typing trainer with adaptive lessons, code mode, finger heatmap and certificate. QWERTY, Dvorak, Colemak. 10 languages.
Roman Numerals
Type either box to convert. Switch modes for dates, a Roman clock, lessons, or a quiz. The chart stays visible.
Number to Words
Spell numbers and amounts with real grammar — seven languages, currency, ordinals, checks and batch mode.
Multiplication Table Trainer
Interactive multiplication chart, a times tables trainer that asks the hard facts more often, a mastery map and printable worksheets. In the browser.
Column Arithmetic: Four Operations Step by Step
Long division, multiplication, addition and subtraction step by step on grid paper: carries, remainders, repeating decimals. In your browser.
Fraction Calculator
Add, subtract, multiply and divide fractions with steps: LCD, simplifying, mixed numbers, repeating decimals, GCF and LCM. In your browser.
Chemistry Calculator
Balance chemical equations with the oxidation-number method, find molar mass and percent composition, solve stoichiometry. In the browser.
Number systems with the working
Convert binary, octal, decimal and hex with full working: division ladder, expanded form, bit groups. Two's complement, IEEE 754. In the browser.
Truth tables and Boolean expressions
Truth table with a column for every step, DNF and CNF, Quine–McCluskey minimization, a Karnaugh map and a logic gate diagram. In the browser.
Geometry with a drawing
Triangles, quadrilaterals, circles, polygons and solids from any given data: scale drawing, every value, working with named theorems. In the browser.
Calculus solver
Step-by-step derivatives, integrals and limits: each step names its rule and every answer is checked numerically. Runs in the browser.
English language
3 more in this category →IELTS Writing Checker
IELTS Writing band score for Task 2 essays, Task 1 charts and letters: four criteria with quotes from your text, fixes and a Band 9 version. Online.
Text to IPA
Turn English text into IPA phonetic transcription: context-aware readings, weak forms, stress and syllables, British and American.
Phonetic Spelling
How any English word, phrase or song is read aloud: simple phonetic spelling with stress, IPA, British and American audio, text from a photo.
Syllable Counter
Count the syllables in any English word or text. Dictionary-accurate, with a poetry mode for haiku. Free, in your browser.
Sentence stress
Shows the main stress of each phrase, its thought groups and weak forms. Move the stress to any word, or record yourself and compare the rhythm.
Word Stress
Find which syllable to stress in any English word. Shows the stressed syllable, IPA and noun/verb pairs like REcord vs reCORD. Free, in your browser.
Minimal Pairs
Train your ear on tricky English sounds — ship vs sheep, light vs right. A minimal pairs listening drill, in your browser.
Subtitle vocabulary
Drop in an .srt and see how much of the dialogue you would follow, and which words to learn before you press play.
Vocabulary Size Test
Estimate how many English words you know. A quick, science-based vocabulary size test with a CEFR estimate. Free, no sign-up.
Anki Deck Builder
Paste a word list and build a real Anki .apkg deck — with IPA, audio and a built-in study mode. Free, in your browser.
Word of the Day
A new English word each day with translation, meaning, examples and audio. Save and review words with spaced repetition. Free, in your browser.
My English Word List
Type a word — level, transcription and pronunciation fill themselves in. The card returns the day you start forgetting it, scheduled by FSRS.
English Dictation Practice
Listen to graded English sentences and type what you hear. Word-by-word error highlighting, A1–C2 levels, adjustable speed. Free, in the browser.
English Spelling Test
Hear an English word and spell it. Four difficulty tiers, example sentences, letter-by-letter error marking and a streak counter. Free.
English Vowel Trainer
Hold the vowel like a long, steady note — don't say the consonants around it. Record somewhere quiet for the clearest reading.
Shadowing Studio
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.
English Level Test
Adaptive English level test: vocabulary, grammar, reading and listening. Get your CEFR level with IELTS and TOEFL equivalents. Online, no signup.
English Grammar Course
Learn English grammar by CEFR level A1–C2. Free course with clear lessons, exercises and progress tracking, in your browser.
English Irregular Verbs
A searchable table of 130+ English irregular verbs grouped by pattern, plus a typing trainer for past simple and past participle. Free.
English Phrasal Verbs
A searchable list of 190+ English phrasal verbs with meanings and examples, filterable by particle and CEFR level, plus a fill-in trainer. Free.
English Collocations
Look up an English word and see its natural collocations — the verbs and adjectives that go with it — grouped by pattern with examples. Free.
English False Friends
Browse and quiz English false friends — words that look like a word in your language but mean something else. RU, DE, ES, FR, PT. Free.
Text Tools
14 more in this category →Handwriting from typed text
Turns typed text into a page written by hand: handwriting styles, ruled paper, transparent PNG and PDF. Also writes by hand into an existing PDF form.
Synonyms of a word
Find synonyms for any word in 9 languages — our vetted dictionary plus Wiktionary, grouped by meaning. Online, no sign-up.
Text Rewriter
Rewrite editor: paraphrase, change tone, shorten, simplify or fix your text — in its own language, with the changes highlighted.
Notepad
Online notepad with autosave: many notes, instant search, Markdown, password locks and export to TXT, PDF or Word. Opens straight in the browser.
Word Counter
Count words, characters, sentences, paragraphs. Readability scores, keyword density, social media limits. Free, runs in your browser.
Text Shortener
Cuts text to the number of characters, words or sentences you name: filler goes first, secondary sentences last. Every edit is shown.
Punctuation & Spell Checker
Check Russian and English punctuation, commas, dashes and spelling — with rule explanations and one-click fix. Russian has an advanced in-browser spell-checker.
Poetry Analyzer
Analyze poems: detect meter (iambic, trochaic, dactylic), rhyme scheme, syllable count and spellcheck. For students and writers. Free.
PDF Tools
DjVu to PDF
Converts DjVu to PDF in your browser: letters stay sharp, the text is searchable, bookmarks, links and page numbers carry over.
Document scanner
Photograph a page with your phone — the edges are found for you, the perspective is straightened, the shadows go, and out comes a PDF that will be accepted in place of a scan.
Merge PDF
Combine multiple PDFs into one file. Reorder pages, pick page ranges per file, rotate, add bookmarks. Fast, in your browser.
PDF Compression
Shrinks a PDF while keeping text, fonts and bookmarks — only the images get recompressed. Includes a fit-under-a-size mode. Runs in your browser.
PDF to Word
Convert PDF to a .docx Word file in the browser. Heading detection, page breaks. Editable text.
Word to PDF
Convert .docx to PDF in the browser. A4, Letter, three quality levels, custom margins. No installation.
JPG to PDF
Convert JPG, PNG, WebP, AVIF or HEIC images to one PDF. Drag to reorder, rotate, set page size + margins.
Voice & Speech
Audio Translator
Translate an audio recording into another language and hear it: podcasts, interviews, lectures, voice notes. Audio, transcript and subtitles out.
Speech to Text
Speak into your microphone and watch text appear in real time. Voice commands, auto-punctuation, 34 languages.
Audio to Text
Upload a recording and get the text in paragraphs, with speaker labels and timecodes. Edit on the page, download DOCX, PDF or subtitles.
Text to Speech
Convert text to natural speech with neural AI voices in 30+ languages. Download as MP3.
Online Voice Recorder
Record from microphone or system audio directly in your browser. No installation, no signup — just press record.
Russian language
4 more in this category →Russian Stress Marks
Automatically place stress marks on Russian text, pick the variant for homographs, and restore the letter ё.
Declension by Case
Enter a noun and get it in all six cases, singular and plural, with stress marks and audio.
Russian Vocabulary Test
An adaptive test estimates how many Russian words you know from your "know / don't know" answers.
Yoficator
Automatically restore the letter ё in Russian text: clear cases instantly, ambiguous ones are yours to choose.
Russian Word Analysis
Phonetic, morphemic and grammatical analysis of any Russian word form: sounds and letters, transcription, stress, parts of speech. In the browser.
Documents
E-book Reader
Online e-book reader for EPUB, FB2, MOBI, PDF, DjVu and TXT: a library with covers, bookmarks, notes, reading stats and night themes.
Document translation that keeps the layout
PDF, Word, Excel, PowerPoint and EPUB translated with the layout intact: tables, columns and slides stay put. Scans are read, edits before download.
Word Processor
A document editor in your browser: opens and saves DOCX, exports PDF with real text, letter and report templates, APA and MLA formatting.
OCR Text Extractor
Drop an image, PDF or a full folder — get editable text, Word, Excel or searchable PDF.
Diagrams and charts
1 more in this category →Flowchart
Flowchart editor: Mermaid text and mouse in one window, diagrams from a description or from code. Block nudges stay put. PNG, SVG, PDF.
Chart Maker
Bar, pie, line and scatter charts from an Excel range or a word problem, with the math worked out for homework
Timeline Maker
Make a timeline on a true time scale: BC dates, centuries, periods and categories. Export to PNG, PDF and PowerPoint. In the browser.
Electronics
Career
1 more in this category →Calculators
Biology & Microscopy
2 more in this category →Other tools
Photo translator
Reads the text on a photo and puts the translation back in its place, keeping color and layout. Live camera, 22 reading languages, editable.
Focus Session
Name one step, set a short sprint, and put distractions on a list instead of into your browser.
Online Timer
Free online timer: run several labeled countdowns at once, plus Pomodoro and HIIT interval modes, fullscreen, and alarm sounds.
Typing Speed Test
Measure your typing speed in words per minute with real-time accuracy tracking
Verb Conjugator
Conjugate verbs in English, Spanish, French, German, Portuguese, Italian, Russian and Ukrainian: every tense, irregular forms marked. In the browser.