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Text tools
☆ Word Counter Words, characters, sentences, reading time ☆ Case Converter UPPER, lower, Title, camelCase, snake_case ☆ Text Diff Checker Compare two blocks of text line by line ☆ Citation Generator APA 7th, MLA 9th, Chicago 17th — verified formats ☆ Duplicate Line Remover Dedupe, trim, and sort a list of lines ☆ Whitespace & Text Cleaner Strip extra spaces, blank lines, tabs ☆ Lorem Ipsum Generator Placeholder text by paragraph, sentence, or word ☆ Palindrome & Anagram Checker Check words and phrases instantly ☆ Slug Generator Turn any title into a clean URL slug ☆ Readability Score Checker Flesch-Kincaid grade level ☆ Social Media Character Counter X, Instagram, TikTok, LinkedIn limits ☆ Text to Speech Read aloud with your browser's voices ☆ Word Frequency Counter Most-used words, ranked, stopwords optional
Calculators
☆ Mortgage Calculator Monthly payment, total interest, total cost ☆ Rental Property ROI & Cap Rate Calculator No email, no lead form, unlike most "free" versions ☆ Concrete & Lumber Calculator Slab volume + bag count, plus board-foot lumber ☆ Loan Payoff Calculator Time & interest saved by overpaying ☆ Car Loan Calculator Down payment, trade-in, and sales tax included ☆ Debt Payoff Calculator Snowball vs. avalanche, compared side by side ☆ Amortization Schedule Calculator Full month-by-month principal/interest breakdown ☆ Mortgage Refinance Break-Even Calculator Months to recoup closing costs, no lender bias ☆ Home Affordability Calculator 28/36 rule, no lender bias baked in ☆ Federal Tax Bracket Calculator 2025 IRS brackets, verified against irs.gov ☆ Compound Interest Calculator Savings growth, yearly breakdown ☆ Simple Interest Calculator No compounding, quick estimate ☆ Savings Goal Calculator How much to save monthly for a target ☆ FIRE Calculator Your number to retire, years to reach it ☆ Percentage Calculator Three common percentage calculations ☆ Tip Calculator Split the bill, pick a tip percentage ☆ BMI Calculator Metric or imperial, standard WHO ranges ☆ Discount Calculator Sale price and savings from a % off ☆ Unit Price Comparator Compare $/unit across package sizes ☆ Markup & Margin Calculator Selling price from cost and markup ☆ Break-Even Calculator Units needed to cover fixed costs ☆ Age Calculator Exact age, or time between two dates ☆ Date Calculator Days between dates, or add/subtract days ☆ GPA Calculator Standard 4.0 scale, add courses freely ☆ Weighted Grade Calculator Final grade from weighted categories ☆ Unit Converter Length, weight, and temperature ☆ Currency Converter Live daily exchange rates ☆ Recipe Converter & Scaler Cups/tbsp/ml/grams, or scale to new servings ☆ VAT & Sales Tax Calculator Add or remove tax from a price ☆ Net Worth Calculator Assets minus liabilities, private ☆ Grade Needed Calculator Score needed on a final to hit your target ☆ TDEE & Calorie Calculator BMR, maintenance calories, cut/bulk targets ☆ One-Rep-Max Calculator Epley & Brzycki formulas, full training table ☆ Running Pace Calculator Pace/time/distance, plus race-time predictions ☆ Sleep Cycle Calculator Bedtimes/wake times aligned to 90-minute cycles ☆ Mortgage Overpayment Calculator Time & interest saved by paying extra ☆ UK Take-Home Pay Calculator Income Tax & NI, every band editable ☆ UK Stamp Duty Calculator England & NI SDLT, FTB relief, surcharge ☆ ROI Calculator Return on investment, plus annualized rate ☆ Fuel Economy Converter MPG (UK/US), L/100km, km/L at once ☆ Calories Burned Calculator MET-based, any activity, any weight ☆ Quiz Score Analyser Percentage and letter grade, editable bands ☆ Product Comparison Scorecard Weighted criteria, ranked winner ☆ Working Day Deadline Calculator Skips weekends & UK bank holidays
Also see: Overtime Pay Calculator (Work tools)
Generators
☆ QR Code Generator Any text or link, downloadable PNG ☆ QR Code Scanner Camera or image, decoded on-device, no app ☆ Barcode Generator Code128, EAN-13, UPC ☆ Password Generator Cryptographically random, adjustable ☆ UUID Generator Random UUID v4, one or in bulk ☆ Random Number Generator Any range, with or without duplicates ☆ Countdown Timer Count down to any date and time ☆ Meme Generator Top/bottom text, no watermark ☆ Fibonacci Sequence Generator Exact BigInt values, any length
Also see: Random Name Picker , Wheel Spinner & Dice Roller & Coin Flip (Game night) · Invoice Generator & Resume Builder (Work tools) · CSS Gradient Generator (Art & design)
DevOps, Cloud & Infrastructure
☆ .gitignore Generator Node, Python, Java, Go, Rust & more ☆ Cron Expression Explainer Plain English + next 5 run times ☆ Subnet Calculator IPv4 CIDR → network, broadcast, host range ☆ CIDR/Subnet Overlap Checker Catch IP range conflicts before they cause an outage ☆ DNS Lookup A, AAAA, MX, TXT, CNAME, NS records ☆ Chmod Calculator rwx matrix → octal and symbolic ☆ Docker Compose → Kubernetes/Helm Convert a compose file to manifests or a starter Helm chart ☆ Linux Command Cheat Sheet Searchable sysadmin/DevOps command reference ☆ Bash Command Explainer Breaks down any command, flags & operators ☆ PowerShell Command Explainer Breaks down cmdlets, parameters & pipeline ☆ DevOps & Kubernetes Glossary Searchable terminology: containers, k8s, CI/CD, cloud ☆ Kubeconfig Viewer & Merger See every cluster/context/user at a glance, merge safely ☆ Kubernetes Secret Decoder Batch base64 decode/encode a Secret's data block ☆ Kubernetes RBAC Visualizer Plain-English breakdown of who can do what ☆ Batch Log Timestamp Converter Every ISO/epoch timestamp in a log, converted inline ☆ Terraform Plan Summarizer Clean create/update/destroy breakdown, zero upload ☆ Ansible Playbook Explainer Plain-English, task-by-task breakdown of a playbook ☆ Helm values.yaml Explainer, Builder & Diff Plain-English field breakdown, build with a form, or diff two versions ☆ Kustomize Explainer & Builder Plain-English field breakdown, or build one with a guided form ☆ Dockerfile Linter Unpinned images, root user, cache-busting layers, leaked secrets ☆ Nginx Config Generator Static site, reverse proxy, or load balancer server block ☆ systemd Unit File Generator ExecStart, User, Restart policy, env vars → .service file ☆ GCP IAM Policy Visualizer Plain-English role bindings, overly broad grants flagged ☆ GitHub Actions Workflow Explainer Triggers, jobs, and every step in plain English ☆ Docker Compose Port Conflict Checker Catch host port collisions before docker compose up ☆ Kubernetes Resource Request/Limit Calculator Aggregate footprint and pods-per-node estimate ☆ SSH Config Generator Host blocks, including bastion/jump-host ProxyJump ☆ .env File Validator Duplicate keys, unquoted spaces, likely leaked credentials ☆ Web Server Access Log Analyzer Top IPs, status codes, requests by hour of day ☆ Terraform Variable & Output Extractor A module's full interface, no file hunting ☆ Terraform State File Viewer Browse resources & outputs — never uploaded, unlike most viewers ☆ AWS ARN Parser Partition, service, region, account, resource — explained ☆ .gitattributes Generator Line endings, language presets, Git LFS, vendored paths ☆ .env File Diff Tool Catch drift between staging and production ☆ Kubernetes Manifest Validator Missing fields, unknown kinds, misconfig smells ☆ Docker Image Layer Size Analyzer See which layer is actually bloating your image ☆ PromQL Query Explainer Metric, filters, range, and every function explained ☆ Grafana Dashboard JSON Explainer Every panel, datasource, and query at a glance ☆ Bash Script Linter Unquoted vars, missing set -e, backticks, unsafe rm -rf ☆ Terraform Dependency Visualizer Paste .tf directly — no terraform graph, no Graphviz, no install ☆ GitHub Actions Secrets & Variables Extractor Every secrets.X and vars.X a workflow needs, plus gh CLI setup commands ☆ .htaccess to Nginx Converter RewriteRule, Redirect, ErrorDocument, and more ☆ .dockerignore Generator Language presets, secrets, CI config, OS junk ☆ htpasswd Generator bcrypt or SHA1, hashed locally, Apache/Nginx ☆ Build Your Own NAS From an Old PC Beginner's guide: hardware, OS choice, storage pools, shares ☆ CIDR/Subnet Splitter Divide a block into equal subnets ☆ Dockerfile Generator Pinned base image, non-root user, cache-friendly layers ☆ Kubernetes CronJob Builder Schedule, image, and policy fields → full YAML ☆ Kubernetes App Builder One form → Deployment, Service, ConfigMap, Secret, Ingress, HPA ☆ Kubernetes Architecture Visualizer Paste manifests, see how they actually connect ☆ .env to Kubernetes ConfigMap/Secret Base64-encodes Secret values automatically ☆ Terraform .tfvars Generator Fill a form from your variable blocks, export .tfvars
Data & Code Formatters
☆ JSON Formatter Format, validate, and minify JSON ☆ JSON Schema Validator Validate JSON against a schema, via tv4 ☆ Base64 & Base32 Encode/Decode Text to Base64 or Base32 and back ☆ URL Encoder/Decoder URL-encode or decode any string ☆ HTML Entity Encoder Escape and unescape HTML entities ☆ Binary / Hex / Decimal Converter All four common number bases live ☆ Markdown Previewer Live-rendered side by side ☆ Markdown Linter Unclosed fences, skipped headings, broken refs ☆ CSV ↔ JSON Converter Paste one, get the other, both ways ☆ YAML ↔ JSON Converter Paste one, get the other, both ways ☆ Markdown Table Generator Paste CSV/TSV, get a ready Markdown table ☆ JSON to TypeScript Converter Generates interfaces, handles nesting ☆ JSON Diff Checker Structural comparison, not line-by-line ☆ Query String Builder & Parser Build or parse URL params, both directions ☆ Image to Base64 Encoder Data URI for CSS/HTML embedding ☆ HTML Minifier Safe whitespace/comment stripping ☆ CSS Minifier Safe whitespace/comment stripping ☆ YAML Linter & Formatter Validate syntax with exact error lines, reformat indentation ☆ SQL Formatter & Beautifier Uppercase keywords, clause line breaks, instant ☆ GraphQL Query Formatter & Validator Balanced-brace check plus clean indentation ☆ Fake JSON / API Mock Data Generator Define a shape, generate realistic fake records ☆ OpenAPI / Swagger Explainer Every endpoint, method, and parameter at a glance ☆ JSON Schema Generator Infer a schema from a sample JSON document ☆ YAML Diff Tool Structural comparison, not line-by-line
Security & Privacy
☆ Hash Generator SHA-1, SHA-256, SHA-384, SHA-512 ☆ File Checksum Verifier Verify a download against a published checksum ☆ File Type Identifier Detects disguised files from real magic bytes ☆ Subresource Integrity (SRI) Hash Generator Protect against a compromised CDN, never leaves your browser ☆ Secrets Scanner Catch exposed API keys/tokens before you commit ☆ Content Security Policy Builder & Analyzer Build a CSP, or flag risky patterns in an existing one ☆ Credit Card Validator (Luhn) Checksum + network detection ☆ IBAN Validator MOD-97 checksum check ☆ Password Strength Checker Entropy, crack time, nothing sent ☆ Password Breach Checker k-anonymity — password hashed locally, never sent ☆ JWT Decoder Header + payload, expiry check, nothing sent ☆ What Is My IP Address? Public IP + browser/OS/timezone info ☆ WebRTC Leak Checker Check if WebRTC exposes your real IP behind a VPN ☆ Gravatar Privacy Checker See what's publicly linked to an email, hashed locally ☆ Privacy & Fingerprint Checker Canvas fingerprint, WebGL renderer, and more ☆ URL Safety Signal Checker Spot phishing-style tricks before you click ☆ Email Header Analyzer Delivery path, hop delays, SPF/DKIM/DMARC results ☆ JWT Encoder Real HMAC-SHA256 signing via Web Crypto ☆ Passphrase Generator Diceware-style, cryptographically random ☆ TLS Certificate Decoder & Expiry Checker Issuer, subject, SANs, and days until expiry ☆ SSH Key Fingerprint Calculator SHA256 fingerprint via Web Crypto, verified against ssh-keygen
Web Dev & SEO
☆ Color Converter HEX, RGB, and HSL, with a picker ☆ Favicon Generator Every standard size, no upload ☆ SEO Title & Meta Checker Google truncation limits, live preview ☆ Social Share Preview See link cards before you post ☆ Screen Resolution Checker Viewport, DPR, browser info ☆ Color Contrast Checker WCAG AA/AAA pass/fail, live preview ☆ Color-Blindness Simulator Preview protanopia, deuteranopia, tritanopia ☆ Accessible Color Palette Generator Okabe & Ito colorblind-safe palette for charts ☆ HTTP Status Codes Reference Searchable, plain-English meanings ☆ robots.txt Generator Allow/disallow rules, sitemap reference ☆ robots.txt Tester Google's own longest-match algorithm, verified ☆ Sitemap.xml Generator Paste URLs, set changefreq and priority ☆ Meta Tag Generator Title, description, OG & Twitter Card tags ☆ Schema Markup Generator JSON-LD for Article, Product, FAQ & more
General Dev Utilities
☆ Regex Tester Live match highlighting, JS flavor ☆ Unix Timestamp Converter Epoch seconds to date and back ☆ Prime Number Checker Check or list primes up to a limit ☆ cURL Command Builder Method, headers, body → ready command ☆ Open Source License Generator MIT, Apache 2.0, GPL 3.0 & more, verbatim ☆ ULID Generator Sortable unique IDs, timestamp-prefixed ☆ Conventional Commit Builder Type, scope, breaking change footer ☆ Code Explainer Paste a function, get an instant structural breakdown — plus optional on-device AI ☆ Semver Calculator & Comparator Compare, bump, or check a version against a range ☆ Webhook Payload Inspector GitHub, Stripe, Slack auto-detected and explained ☆ HAR File Analyzer Slowest requests, failures, content-type breakdown ☆ Visual Regex Builder Click to compose a pattern, live match highlighting ☆ curl to Code Converter JavaScript, Python, or PHP from a curl command On-device AI
File & privacy tools
☆ File Encryptor / Decryptor Real AES-256-GCM, native Web Crypto API, never leaves your browser ☆ Password Vault Encrypted locally with a master password, never synced ☆ TOTP Authenticator RFC 6238 2FA codes, generated locally, never synced ☆ Screen Recorder Record screen/window + mic, no time limit, no upload ☆ Clean Article Reader Strip ads, popups, and life-story preamble from any page ☆ Audio Trimmer & Normalizer Drag to trim, peak-normalize volume, export WAV ☆ AI Noise Remover & Dialogue Booster Real neural denoiser, voice-aware boost, manual mute tool ☆ Subtitle Resync & Cleaner Fix drift, correct frame-rate, strip tags, SRT/VTT convert ☆ CSV / TSV Diff & Dedupe Row- and cell-aware comparison, plus duplicate finder ☆ Merge PDF Files Combine and reorder PDFs, never leaves your browser ☆ Split & Extract PDF Pages Pull a page range, or split every page, never leaves your browser ☆ PdfCraft Full PDF workbench: view, organize, fill, sign, edit ☆ Image ⇄ PDF Converter Images to PDF, or PDF pages back to PNG ☆ EXIF Metadata Remover Strip GPS, camera model, timestamps ☆ PDF Metadata Remover Strip author, company, and software metadata ☆ Image Redactor Black out sensitive info, baked into the pixels ☆ Text PII Redactor Emails, phones, SSNs, Luhn-validated card numbers, IPs ☆ Terms of Service Red-Flag Scanner Spots data-selling, arbitration, auto-renewal clauses ☆ Data Deletion Request Letter Generator GDPR/CCPA request, no middleman gets your data ☆ Image Format Converter PNG, JPG, WebP — batch, adjustable quality ☆ Image Compressor Shrink JPG, PNG, and WebP photos in your browser ☆ GIF Maker Stack images into an animated GIF, reorder and set the delay ☆ Gradient Art Generator Colour blobs, curves, grain and glitter. PNG up to 4x, no account Image Compressor Shrink JPG/PNG/WebP, no upload
Productivity
Fun & miscellaneous
Also see: Morse Code Translator (Music & hobbies) · Image Compressor (File & privacy tools)
Game night
Trading card & video games
☆ Life Counter Magic: The Gathering / Commander life tracker ☆ Yu-Gi-Oh LP Counter 8000/4000/16000 presets, coin toss, dice roll ☆ WoW Classic DKP Tracker Guild loot point ledger, CSV export, saves locally ☆ WoW Classic Loot Roll Tracker Roll 1-100 for every player, ranked instantly ☆ WoW Classic AH Flip Calculator Real profit after the 5%/15% auction house cut ☆ CPS Test Clicks-per-second speed test, tracks your best ☆ Reaction Time Test Visual reaction time in milliseconds, 5 rounds ☆ Minecraft Coordinate Calculator Overworld ↔ Nether conversion, both directions ☆ Dice Pool Roller Success-counting dice for World of Darkness, Shadowrun ☆ Chess Elo Calculator Standard formula, selectable K-factor ☆ D&D 5e Encounter Calculator Official DMG XP thresholds & multiplier ☆ Borderlands 3 Skill Tree Planner Amara, FL4K, Moze, Zane — real tier-gating by level ☆ Pokémon Early-Game Team Builder Random, type-balanced team from what's catchable by gym 3-4 ☆ Tiny Tina's Wonderlands Skill Planner All 6 classes, real multiclass with shared point budget
Browser games
☆ Crate Quest A real little platformer — you play a wooden crate ☆ Connect Four vs. AI Real alpha-beta minimax opponent, 3 strengths ☆ Balloon Tower Defense Place towers, pop 15 waves of balloons before they leak ☆ Line Rider Sled Draw a track with limited ink, ride it to the flag ☆ Echoes of Aetheria Creature RPG prototype: harmonize Synths, battle, save your progress ☆ Resonance Synths Creature-collecting RPG: tune, harmonize, battle a Circuit Master ☆ Word Ladder Puzzle Every puzzle BFS-verified solvable, real word chains ☆ Higher or Lower: Facts Duel Real sourced numbers, streak game, no lost progress behind a login ☆ Retro Game Emulator NES to N64 — play your own legally-owned ROM backups
Work tools
☆ Meeting Cost Calculator What a meeting really costs, live counter ☆ Subscription Cost Tracker See your real monthly/annual total, no bank linking ☆ 50/30/20 Budget Planner Needs, wants, savings targets, no bank linking ☆ Group Expense Splitter Who owes whom, minimal transactions, no account ☆ UTM Campaign URL Builder Build trackable links, history saved locally ☆ Overtime Pay Calculator Regular + overtime pay by the week ☆ Freelance Hourly Rate Calculator What to charge to hit your income goal ☆ Invoice Generator Fill in, print, or save as PDF ☆ Resume Builder Print or save as PDF, no watermark ☆ Resume ATS Compatibility Checker Common parsing pitfalls, never leaves your browser ☆ Email Signature Generator Copy straight into Gmail, Outlook, Apple Mail ☆ DeckCraft Slide decks: themes, charts, transitions, PowerPoint files ☆ GridCraft Spreadsheet editor, opens and saves real .xlsx files ☆ Creative Brief Builder Goals, audience, deliverables — print or copy ☆ Event Run Sheet Builder Timed schedule, auto-sorted, printable ☆ Trip Budget Planner Budget by category, total and per-day ☆ UK Holiday Entitlement Calculator Statutory 5.6-week minimum, pro-rated ☆ Weekly Work Hours Calculator Clock-in/out per day, breaks subtracted
Also see: Pomodoro Timer (Productivity)
Art & design
☆ Sketch Pad Pressure-sensitive pencil/pen/marker/eraser ☆ Simple Photo Editor Crop, rotate, adjust, filter — the 90% you need ☆ PhotoCraft Full layered editor: masks, type, real PSD files ☆ LightCraft Photo library & non-destructive raw developer ☆ DesignCraft Page layout & publishing: frames, type, master pages ☆ EffectCraft Motion graphics & VFX compositor, 300+ effects ☆ FilmCraft Timeline video editor: cutting, color, sound ☆ CadCraft 2D CAD & drafting: snaps, layers, dimensions, DXF ☆ Logo & Graphic Maker Text + shapes, real SVG export, no paywall ☆ Color Palette Generator Random, complementary, analogous, triadic ☆ CSS Gradient Generator Visual linear/radial gradient builder ☆ CSS Box Shadow Generator Visual builder, inset support ☆ CSS Border Radius Generator Per-corner control, organic blob shapes ☆ Code to Image Shareable code screenshots, no signup ☆ ASCII Art Text Generator Big block-letter banners for any text ☆ Instagram Toolkit Resize/crop, grid preview, caption & hashtag checker
Also see: Color Converter , Favicon Generator & Color Contrast Checker (Web Dev & SEO)
Interior & home
Music & hobbies
☆ Online Metronome Adjustable BPM, tap tempo, accented beats ☆ Morse Code Translator Text to Morse, with audio playback ☆ Sheet Music Composer Cut-down notation editor — play back, export PNG/MIDI ☆ Voice to Sheet Music Notates the actual melody hidden in your speech ☆ Guitar Tab ⇄ Sheet Music Converter Enter either format, both stay in sync — no text parsing ☆ Web Synthesizer Polyphonic synth + sampler: filter, envelopes, LFO, MIDI in ☆ SoundCraft Multitrack DAW: mixer, plugins, automation, MIDI
Also from this workshop
All tools run client-side. No signup required. No tracking, no ad-tech scripts, nothing you type or upload ever leaves your browser.