Lumina — 400+ Curated AI & Developer Tools, Free Discovery Platform

Open-source grammar, spelling, and style checker supporting 30+ languages including English, German, French, and Spanish. Works in the browser without sign-up and offers browser extensions plus a self-hostable API for privacy-conscious users.

AI-powered writing companion from DeepL that fixes grammar mistakes and improves phrasing, tone, and clarity. Supports multiple styles and dialects (like British vs American English), making drafts sound more natural and professional in one click.

Free AI grammar checker that catches spelling, punctuation, and grammar errors while suggesting smoother rewrites. Includes word-level improvement hints and pairs well with QuillBot's paraphraser and summarizer tools on the same platform.

Widely regarded as the most accurate machine translator, known for producing natural-sounding translations across 30+ languages. Supports text, documents, and speech, with glossary features to enforce consistent terminology.

Google's free translation service covering 100+ languages with text, document, website, handwriting, and camera photo translation. Includes offline packs on mobile and conversation mode for real-time two-way spoken translation.

Fully free and open-source translation engine that can be self-hosted for complete privacy. No account required for basic use, supports dozens of languages, and exposes a simple API for developers building multilingual apps.

Quickly convert any text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and more. Also includes handy extras like counting characters, stripping formatting, and downloading the converted result.

World-class collection of text utilities including regex find-and-replace, line deduplication, splitting and joining, case conversion, and text statistics. Everything runs client-side in your browser, so it works offline once loaded.

Sort any list alphabetically, numerically, by length, or in random and reverse order. Includes cleanup options like removing duplicates and empty lines, making it great for tidying name lists, keywords, or CSV data.

Fast side-by-side diff viewer that highlights line-by-line differences between two texts or code snippets. Handles large inputs smoothly and color-codes added and removed lines for quick comparison during code review.

Versatile converter for text encodings and ciphers: Morse code, binary, hex, Base64, URL encoding, hash functions, Caesar and other classical ciphers, number systems, and date formats — all converted instantly as you type.

Modular web playground for encoding and cryptography where you visually chain blocks like text, ciphers, and encodings into a pipeline. Great for learning how classical ciphers such as Enigma, Caesar, and ROT13 work hands-on.

Simple, no-nonsense online encoder and decoder for Base64 strings, supporting UTF-8 text and file conversion both ways. Handles large inputs gracefully and requires no registration or configuration.

Minimalist open-source pastebin where the server has zero knowledge of pasted content because everything is encrypted and decrypted in your browser. Supports expiry timers, burn-after-reading, password protection, discussions, and syntax highlighting.

Free markdown pastebin designed for quickly publishing long-form text with custom URLs and custom styling. No account needed, edits via an edit code, and pages render as clean shareable documents rather than plain dumps.

Every gist is a full Git repository, giving you versioned snippets with syntax highlighting for many languages. Public gists are searchable and shareable while secret gists stay unlisted — free with any GitHub account.

Open-source pastebin focused on privacy with automatic language detection, configurable expiration, private pastes, and no tracking or ads. Supports creating anonymous pastes instantly or keeping an account for history.

The definitive encyclopedia of emoji with meanings, usage history, and previews of how each emoji renders across Apple, Google, Samsung, Windows, and other platforms. Essential reference for designers picking cross-platform-safe emoji.

Fast emoji search engine where you type a keyword and get every related emoji ready to copy with one click. Clean interface with no clutter, perfect for finding exactly the right emoji for messages or designs.

Easily browse and copy special characters — accented letters, arrows, math symbols, punctuation, and more — that are missing from your keyboard. Organized by category so you can find and click any character to copy it instantly.

Discover Unicode characters and symbols by searching keywords like 'star', 'arrow', or 'check' across a huge library of over a million characters. Also lets you explore by Unicode block and copy HTML entities directly.

Converts plain text into fancy Unicode styles — bold, italic, cursive, strikethrough, small caps, and more — that work in Instagram bios, tweets, and chat apps. Just type, pick a style, and paste anywhere that accepts text.

The classic Text to ASCII Art Generator with dozens of figlet-style fonts that turn short words into big terminal-ready banners. Live preview updates as you type, with options to control width and character styling.

Drag-and-drop editor for building polished project READMEs without memorizing Markdown. Pick sections from templates, edit them inline with live preview, then export or copy the generated README.md for your repository.

Convert tables between Markdown, CSV, JSON, SQL, HTML, LaTeX, Excel, and many more formats. Paste or upload a table, optionally edit it in the built-in grid, and copy out perfectly formatted output for docs or code.

Modern open-source typesetting system positioned as a faster, saner alternative to LaTeX. Write markup with built-in scripting, see results compile instantly in the browser, and collaborate in real time on the free tier.

The standard collaborative cloud LaTeX editor used by millions of researchers and students. Features real-time preview, rich template gallery for papers and theses, tracked changes, and hassle-free PDF compilation without local setup.

Free browser-based dictation tool converting live speech into text across 70+ languages. Supports custom voice commands for punctuation and editing, making hands-free writing of notes, essays, and emails fast and accurate.

Free workbench built specifically for transcribing recorded interviews and lectures. Plays audio or video alongside your typing area with keyboard hotkeys for playback control, automatic saving to browser storage, and interactive timestamps.

Minimalist, highly customizable typing test that measures speed and accuracy in words per minute. Offers multiple modes, languages, themes, and detailed stats — widely considered the best way to practice touch typing daily.

Adaptive typing tutor that generates practice lessons targeting your weakest keys based on real-time error analysis. Tracks progress per key with charts, gradually introducing new letters until you type fluently without looking.