Everything is processed in your browser. Nothing leaves your device.
Generate SHA-1, SHA-256 and SHA-512 hashes from text or files
Encrypt and decrypt files with XChaCha20-Poly1305
Generate strong, random passwords
Split a secret into multiple shares using Shamir's Secret Sharing — any K of N shares can reconstruct the original
Generate deterministic passwords from a master password — same inputs always produce the same output, nothing stored
Encrypt text with a password and generate a shareable link — the encrypted data stays in the URL fragment and never reaches any server
Decode and inspect JSON Web Tokens
Transfer text or files between devices using animated QR codes — zero network required
Hide secret messages inside images, text, or audio files using steganography techniques
Analyze and visualize the randomness of data, files, and text with Shannon entropy, chi-squared, and heatmaps
See your browser's unique digital fingerprint — learn what websites can detect about you without cookies
Markdown note editor with optional encryption — everything is stored in your browser
Focus timer using the Pomodoro technique — work in focused intervals with scheduled breaks
Task board with drag-and-drop, per-card timer and encrypted export — everything is local in your browser
Organize your tasks with priorities, due dates and multiple lists — everything is local in your browser
Encode and decode text to Base64
Format, validate, and minify JSON
Encode and decode URLs and URI components
Encode and decode HTML entities
Convert between JSON and YAML formats
Convert between CSV and JSON formats
Generate and validate UUIDs (v4 and v7)
Convert between Unix timestamps and dates
Generate URL-friendly slugs from text
Parse and explain cron schedule expressions
Test and debug regular expressions with live matching
Calculate Unix file permissions in octal and symbolic notation
Convert numbers between decimal, hexadecimal, octal, and binary
Format and minify SQL queries
Count words, characters, sentences, and more
Generate placeholder Lorem Ipsum text
Convert Markdown to HTML with live preview. Supports common Markdown subset.
Compare two texts and see the differences
Generate and read QR codes
Pick colors and convert between HEX, RGB, and HSL
Convert images between PNG, JPEG, and WebP formats with optional resize
View and strip EXIF metadata from JPEG images
Merge multiple PDFs or split pages from a PDF
Blur, pixelate, or redact regions in images. Strip EXIF metadata. All processing is local.
Generate placeholder images with custom dimensions, colors, and text — download as PNG, JPEG, WebP, or SVG
Visualize audio frequencies over time with a spectrogram and waveform display
Explore the infinite library that contains every possible page of text
Play chess against Stockfish or analyze positions
Dice roller, deathroll game and Spanish lottery number generator — cryptographic randomness
Play Sudoku with cryptographic board generation, hints and timer — fully offline
Train Conway's Doomsday algorithm to mentally calculate the day of the week for any date
Roll dice with D&D notation, advantage/disadvantage, ability score generation and saved presets
D&D 5e initiative and combat tracker with HP, conditions and turn management
D&D 5e character sheet manager with stats, combat, spells, inventory and notes — stored locally
D&D 5e spellbook manager with spell slots, filters and multiple spellbooks — stored locally
Generate procedural dungeon maps with BSP rooms or cavern-style walks — export as PNG