Sitemap — Page 7

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.

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.

AI builds a lesson presentation from your topic: slides, lesson plan, handout and a narrated video. PowerPoint export with speaker notes.

The periodic system, the solubility chart, the activity series of metals and a molar mass calculator on one page, with data from PubChem.

Type either box to convert. Switch modes for dates, a Roman clock, lessons, or a quiz. The chart stays visible.

Pick a level, fill in the answers, and tap Check. Earn coins, open chests, and unlock new worlds.

Adaptive algebra diagnostic for grades 5–11: shows which topics are mastered, where the gaps are, and what to study first.

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.

Grid, millimeter, dots, isometric, staves and handwriting guides as PDF with exact millimeters and a printer calibration.

Practice touch typing with progress tracking

Interactive alphabet guide for 12 languages. Click any letter to hear its pronunciation. Learn mode + quiz mode.

Spell numbers and amounts with real grammar — seven languages, currency, ordinals, checks and batch mode.

Free adaptive logic puzzles for kids 5–12: patterns, odd-one-out, analogies, shapes, and deduction. Voice narration and a parent skill report.

Pick an animal and a source, then drag the slider to compare your vision with theirs.

Fill in a blank outline map on a phone or computer and print it

Drag any country across the map and see its real size: Mercator stops inflating it. Compare countries, states and regions by true area.

Solve equations, inequalities and systems step by step: discriminant, Vieta, domain, sign chart and a substitution check. Works from a photo.

Graph any function and get its zeros, extrema, asymptotes and intersections as numbers. Sliders for parameters, table of values, PNG and link.

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.

Sudoku at 4×4, 6×6 and 9×9 with one verified solution and honest difficulty, plus word searches from your own list. Four to a page, PDF with answers.

Rings on its own on schedule — with a bell or a melody — and shows on screen how much time is left in the class.

Interactive multiplication chart, a times tables trainer that asks the hard facts more often, a mastery map and printable worksheets. In the browser.

Long division, multiplication, addition and subtraction step by step on grid paper: carries, remainders, repeating decimals. In your browser.

Add, subtract, multiply and divide fractions with steps: LCD, simplifying, mixed numbers, repeating decimals, GCF and LCM. In your browser.

Balance chemical equations with the oxidation-number method, find molar mass and percent composition, solve stoichiometry. In the browser.

Convert binary, octal, decimal and hex with full working: division ladder, expanded form, bit groups. Two's complement, IEEE 754. In the browser.

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.

Triangles, quadrilaterals, circles, polygons and solids from any given data: scale drawing, every value, working with named theorems. In the browser.

Step-by-step derivatives, integrals and limits: each step names its rule and every answer is checked numerically. Runs in the browser.

Make a class schedule in two minutes: color-coded subjects, bell times, A/B weeks, 10 designs, vector PDF and a phone wallpaper. In your browser.

Count words, characters, sentences, paragraphs. Readability scores, keyword density, social media limits. Free, runs in your browser.

Write a poem to your own brief: occasion, recipient, form, meter and rhyme scheme. 22 fixed forms from sonnet to haiku.

Write song lyrics with a live syllable count, a rhyme-scheme check and section structure. Ten languages, right in the browser.

Cuts text to the number of characters, words or sentences you name: filler goes first, secondary sentences last. Every edit is shown.

All-in-one text formatter: 60+ operations for case conversion, cleaning, encoding, fancy text. Runs in the browser.

Check Russian and English punctuation, commas, dashes and spelling — with rule explanations and one-click fix. Russian has an advanced in-browser spell-checker.

Professional script reader with voice-activated scrolling

Convert between 12 keyboard layouts with auto-detection — QWERTY, Cyrillic, Korean, Arabic and more.

Type with the mouse on Russian, Arabic, Korean and other layouts

Browse 1 940 Unicode emojis with names in 10 languages. Search by paste, hex or :shortcode, copy in one click, download SVG/PNG. Free.

Paste a URL, text, or upload a file — get a clarity score, heatmap and per-word native alternatives.

Find synonyms for any word in 9 languages — our vetted dictionary plus Wiktionary, grouped by meaning. Online, no sign-up.

Check any text for profanity and censor swear words across 10 languages.

Online notepad with autosave: many notes, instant search, Markdown, password locks and export to TXT, PDF or Word. Opens straight in the browser.

Generate placeholder text in 10 languages — exact word or character count, HTML, Markdown or plain. Presets for meta, tweet, SMS.

Rewrite editor: paraphrase, change tone, shorten, simplify or fix your text — in its own language, with the changes highlighted.

Ready-made prompts for photos, chat, video and music, plus a builder that assembles your own prompt part by part and shows what is missing.

Generate a nickname, decorate it with symbols and instantly see where it will be accepted: Steam, Telegram, Discord, Minecraft and more.

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.

Unicode text styles: math alphabets, circles and squares, strikethrough, heart joiners, nickname frames — copied in one click.

Turn any text into ASCII block art. Pick a font (Banner, Big, Standard, Bubble), copy, paste into chat or code comments.

Analyze poems: detect meter (iambic, trochaic, dactylic), rhyme scheme, syllable count and spellcheck. For students and writers. Free.

Encrypted diary, password manager and file safe — AES-256-GCM encryption in your browser via Web Crypto API.

Type a secret, get innocent-looking text to send anywhere; paste it back to recover the exact message.

Hide secret text, files, or images inside pictures using LSB steganography. Optional AES-256 encryption.

Generate strong random passwords

Generate strong diceware passphrases

Check password strength and crack time

Check if a password appears in known data breaches

Generate TOTP 2FA codes from an otpauth secret

Decode otpauth:// QR codes and 2FA secrets

Audit a password list for weakness and breaches

Open and view KeePass .kdbx databases

Convert Bitwarden exports between formats

Split a secret into K-of-N reconstructible shares

Share a secret via a self-destructing link

Generate PGP/GPG key pairs

What Google, Apple and password managers already offer, what to write down, and how to split the key so nobody opens the envelope alone.

Draw pictures online with brushes, shapes and colors

A board per student, no sign-up; LaTeX formulas and graphs, chalkboard and grid, PDF pages, stylus pressure. Send a link — the lesson starts.

Write a book together: start a story or add a page to someone else's. Append-only — nobody can delete your page, editable for 24h.

A free tool to draw in the air with your hand: a hand-tracking model follows your fingertip and a neon brush paints the line. Pinch your fingers to draw, open them to stop.

A picture sits semi-transparent over your camera feed so you can trace it on real paper. Outlines from photos, grid, perspective fix. In the browser.

Build a printable wall newspaper for school holidays, classroom corners or birthdays — drop in photos, text and stickers, then print across A4 sheets.

Animated ecards for any occasion: type a name and watch it shimmer in gold, with glitter and music. Save as a video, GIF or picture. In your browser.

An online tool for the flags of the world: filter by color, check the proportion and color codes, download PNG or SVG — or set the cloth waving in the wind.

Create stereoscopic 3D pictures from photos

Adjust the ring, gear and pen sliders to draw geometric spirograph curves.

Draw on the canvas — every stroke is mirrored into a symmetrical kaleidoscope pattern.

Mix colors like paint or light and get a recipe from your own paints, from a photo: proportions, white balance, batch check.

Convert between HEX, RGB, RGBA, HSL, HSLA, HWB, LAB, LCH and OKLCH. Shade and tint palette, WCAG contrast check, eyedropper.

Turn a tablet or laptop into a light box: a picture at real size in cm or inches, split into screen-sized tiles, with touch lock.

Hash any file with 6 algorithms. Verify downloads, compare files, find duplicates.

Beautify, minify, and validate JSON in the browser. Live error line/column, 2/4/Tab indent. Free, no signup.

Compare two texts side by side. Line, word and character-level diff with insertion/deletion highlighting. Free, in your browser.

Parse and explain cron expressions. See the next 10 run times in your timezone, with human-readable description and field breakdown.

Generate URL-friendly slugs from text. Transliterate Cyrillic and Latin diacritics, choose separator, strip stop words, set max length.

Parse, edit and build URL query strings. Visual table editor, automatic encode/decode, array notation, JSON export.

Convert between JSON arrays and CSV files. Auto-detect direction, configurable delimiter, type coercion, header row toggle. Free, in browser.

Beautify or minify HTML in your browser. Indent options, comment removal, void-element handling, preserves <pre>/<script>/<style> content.

Open an .md file and read it as a finished document. Edit, build tables, jump by outline, save to PDF, Word or HTML — in your browser.

Format, validate, and convert YAML in your browser. YAML ↔ JSON bidirectional, indent options, multi-document support.

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

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

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

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

Identify the algorithm behind any hash: MD5, SHA-256, bcrypt, Argon2, NTLM and 50+ more. Ranked matches with hashcat & John modes. Free.

Convert TTF, OTF, WOFF and WOFF2 in any direction, subset by language, pin variable axes and repair vertical metrics. Runs in the browser.