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• Attendance Tracker — Generate a ready-to-use Excel attendance sheet with formulas, dropdowns, and a summary — enter your roster and date range, download in seconds.
• Barcode Generator — Generate Code 128, EAN-13, UPC-A, and 6 other barcode formats.
• Calendar Heatmap Generator — Turn any dated data into a GitHub-style contribution heatmap.
• Cheatsheet Hub — Interactive cheatsheets for Git, CSS, Linux, React, Vim, and more.
• City Name Generator — Generate fantasy, real-world, sci-fi, and post-apocalyptic city names from a curated fragment catalog.
• Color Palette — Extract colors from images or generate harmonious palettes.
• Credit Card Test Number Generator — Generate Luhn-valid test card numbers and browse provider-specific sandbox test cards for Stripe, PayPal, Adyen, Braintree, Square, and more.
• CSS Cheatsheet — Quick reference for CSS selectors, Flexbox, Grid, typography, animations, and modern CSS.
• CSS Gradient — Visual CSS background generator & code.
• Cursive Generator — Convert text to cursive, script, italic, fraktur, and 6 more Unicode styles.
• Email Signature Generator — Create professional HTML email signatures with logo, social links, and custom branding.
• Favicon Generator — Create favicons from images, text, or emoji.
• Git Cheatsheet — Essential Git commands — setup, branching, merging, remotes, undoing changes, and more.
• Gitignore Generator — Generate .gitignore files for any language, framework, or IDE — 100+ templates, 100% client-side.
• Image Compressor — Reduce file size without losing visual fidelity.
• Image Resizer — Resize images to exact dimensions, percentage, or target file size — 40+ social media presets, bulk mode.
• Image to Text — Extract text from any image using free browser-side OCR.
• Instagram Story Templates — Free customizable story templates for Instagram.
• Invoice Generator — Create professional invoices with logo, tax calculations, and PDF download — free, no signup.
• Is It Down? — Live status of npm, GitHub, OpenAI, AWS, Cloudflare, Stripe, Vercel, Discord, Slack, Anthropic, and 40+ more developer services.
• Italics Generator — Convert text to italic Unicode — 5 italic variants (Italic, Bold Italic, Sans Italic, Sans Bold Italic, Script).
• JSON Schema Generator — Generate a JSON Schema from one or more sample JSONs — drafts 2020-12, 2019-09, 7, 6, 4.
• Lesson Plan Template Generator — Download 20 free lesson plan templates as Word or PDF — daily, weekly, 5E, preschool, and more.
• Linux Commands Cheatsheet — Essential Linux and Bash commands for navigation, files, processes, networking, and scripting.
• Logo Maker — Design logos with a drag-and-drop canvas editor.
• Lorem Ipsum — Generate placeholder text for design layouts.
• Magic 8 Ball — Ask the Magic 8 Ball online — free yes/no answers, fortunes, and decisions in seconds.
• Mermaid Live Editor — Create flowcharts, sequence diagrams, ER diagrams, class diagrams, state machines, Gantt charts, and more with live preview.
• Name Picker — Spin a wheel to pick a random name.
• Online Timer — Countdown timer with presets from 30 seconds to 2 hours.
• Passport Photo Maker — Create print-ready passport, visa, and ID photos for 30+ countries — at exact mm sizes and 300 DPI, with crop guides, compliance checks, and print sheets.
• Pictionary Word Generator — Random Pictionary words with easy/medium/hard difficulty, 10+ categories, hide-word presenter mode, built-in timer, and team scores.
• QR Generator — QR codes for URLs, WiFi, vCards, and text.
• Random Animal Generator — Pick a random animal from a curated database of 500+ species.
• Random Letter Generator — Pick a random letter A–Z, vowels, or consonants.
• Random Number Generator — Generate random numbers in any range.
• Random Object Generator — Pick a random everyday object from a curated catalog of 400+ items.
• React Cheatsheet — React hooks, component patterns, performance optimizations, and React 19 features.
• Resume Builder — Build an ATS-friendly one-page resume with live preview and PDF export — free, no signup, no data upload.
• Seating Chart Generator — Create classroom seating charts with constraint-aware randomization.
• SQL to ORM Converter — Convert CREATE TABLE SQL to Prisma, Drizzle, SQLAlchemy, Django, TypeORM, Sequelize, GORM, and Ecto model definitions — free, browser-based, no account needed.
• Travel Itinerary Template — Plan any trip day-by-day in your browser.
• Unit Converter — Precise conversion for metric and imperial units.
• UUID Generator — Generate random UUID v4 identifiers.
• Vim Cheatsheet — Vim modes, navigation, editing, search & replace, macros, and essential config.
• YouTube Thumbnail Downloader — Download YouTube video thumbnails in HD and multiple resolutions instantly.

• Audio Compressor — Reduce audio file size without sacrificing quality.
• Audio Converter — Convert MP3, WAV, M4A, OGG, FLAC, and AAC audio files to any format — free, instant, runs entirely in your browser.
• AVIF to JPG Converter — Convert AVIF images to JPG/JPEG with quality control and background fill for transparent AVIF.
• AVIF to PNG Converter — Convert AVIF images to PNG for maximum compatibility.
• Black & White Image Converter — Convert color photos to black and white using nine professional algorithms — Luminosity BT.709, Luminance BT.601, Average, Lightness HSL, Desaturation HSL, s…
• BMP to PNG Converter — Convert BMP bitmap images to PNG with lossless compression — reduces file size by 60–80%.
• CI/CD Configuration Converter — Convert CI/CD pipelines between GitHub Actions, GitLab CI, CircleCI, and Bitbucket Pipelines.
• CSV to XLSX Converter — Convert CSV files to Excel XLSX format.
• CSV to XML Converter — Convert CSV files to XML with configurable element names, attribute mode, pretty-print, and XML declaration.
• DOCX to HTML Converter — Convert Word DOCX documents to clean HTML.
• DOCX to PDF Converter — Convert Word DOCX files to PDF in your browser.
• DOCX to TXT Converter — Extract plain text from Word DOCX files.
• EPUB to MOBI Converter — Convert EPUB ebooks to MOBI format for older Kindle devices.
• EPUB to PDF Converter — Convert EPUB ebooks to PDF for printing or fixed-layout reading.
• HEIC to JPG Converter — Convert HEIC photos from iPhone to JPG or PNG — free, instant, runs in your browser.
• HEIC to PDF — Convert iPhone HEIC photos to PDF — combine into one multi-page document or batch as individual PDFs, runs in your browser.
• ICO to PNG Converter — Extract all embedded images from an ICO favicon file and download them as PNG.
• Image to PDF — Convert JPG, PNG, WebP, and other images to PDF — batch convert and combine in your browser.
• JPG to PDF — Convert JPG images to a PDF document — combine multiple photos into one file in your browser.
• JPG to WebP Converter — Convert JPG/JPEG images to WebP for 25–35% smaller file sizes.
• JSON ↔ CSV Converter — Convert JSON arrays to CSV and CSV back to JSON.
• MOBI to EPUB Converter — Convert Kindle MOBI ebooks to EPUB format for use on non-Kindle e-readers.
• PDF to JPG — Convert PDF pages to high-quality JPG images — free, no upload, runs entirely in your browser.
• PDF to Word — Convert PDF files to editable Word documents (DOCX) — free, instant, runs in your browser.
• PNG to AVIF Converter — Convert PNG images to AVIF — the most efficient image format available, up to 50% smaller than JPEG at the same quality.
• PNG to ICO Converter — Convert PNG images to ICO favicon files.
• PNG to PDF — Convert PNG images to a PDF document — combine multiple PNGs into one file in your browser.
• PNG to WebP Converter — Convert PNG images to WebP format for smaller file sizes — typically 25–35% smaller.
• Screen Recorder — Record your screen, webcam, or both directly in your browser.
• SVG Converter — Convert SVG to PNG at any resolution or ICO for favicons.
• TIFF to JPG Converter — Convert TIFF/TIF images to JPG.
• TIFF to PNG Converter — Convert TIFF/TIF images to PNG with lossless output.
• Watermark Remover — Remove watermarks, logos, and text overlays from images using intelligent content-aware fill.
• WebP to JPG Converter — Convert WebP images to JPG/JPEG.
• WebP to PNG Converter — Convert WebP images back to PNG format for universal compatibility.
• XLS to CSV Converter — Convert Excel XLS or XLSX files to CSV.
• XML to CSV Converter — Flatten XML data into CSV rows.

• Age Calculator — Calculate your exact age in years, months, days, hours — and more.
• Aspect Ratio Calculator — Find, simplify, and convert aspect ratios for images, video, and social media.
• BMI Calculator — Calculate your Body Mass Index with ideal weight range and health category.
• Body Fat Calculator — Calculate body fat percentage using the US Navy formula or BMI method.
• Calorie Calculator — Calculate daily calorie needs, BMR, TDEE, calorie deficit, and macros.
• Car Loan EMI Calculator — Calculate auto loan EMI, total interest, and amortization schedule.
• Coast FIRE Calculator — Find your Coast FIRE number — the portfolio size that grows to your retirement goal with no further contributions.
• Compound Interest Calculator — Calculate how your savings grow with daily, monthly, or annual compounding.
• Dividend Calculator — Calculate dividend yield, project DRIP reinvestment growth over 40 years, and build a monthly income portfolio.
• Education Loan EMI Calculator — Calculate student loan EMI, total interest, and repayment schedule.
• EMI Calculator — Calculate loan EMI, total interest, and amortization schedule instantly.
• Fat FIRE Calculator — Model early retirement with $100K+ annual spending.
• Final Grade Calculator — Find out what score you need on your final exam to reach your target course grade.
• GPA Calculator — Calculate semester and cumulative GPA across 4.0, 5.0, and international grading scales.
• GPA Scale Converter — Convert between percentage, letter grades, 4.0, 4.3, 5.0, and international GPA scales.
• Grade Calculator — Calculate your current course grade from weighted assignments or total points earned.
• Gravel Calculator — Estimate gravel by the cubic yard, ton, or truckload — for driveways, walkways, French drains, and landscaping.
• IP Calculator — Calculate subnet mask, network address, broadcast, wildcard mask, usable hosts, and binary representation for any IPv4 or IPv6 CIDR.
• Lean FIRE Calculator — Plan early retirement on a lean $25K–$40K/year budget.
• LLM Cost Calculator — Compare token counts and API costs across GPT-5, Claude Opus 4.7, Gemini 3, and more — all in your browser.
• Math Problem Steps — Solve equations, derivatives, and integrals with full step-by-step explanations — algebra through calculus, free, no paywall, runs in your browser.
• Mortgage Affordability Calculator — Find out how much house you can afford based on income, debts, down payment, and interest rate.
• Mortgage Calculator — Calculate mortgage EMI, total interest, and full repayment schedule.
• One Rep Max Calculator — Estimate your 1RM using 7 formulas (Epley, Brzycki, and more).
• Paycheck Calculator — Calculate your take-home pay after federal, state & local taxes, 401k, and deductions.
• Percentage Calculator — Calculate percentages, find what percent one number is of another, and more.
• Personal Loan EMI Calculator — Calculate personal loan EMI, interest, and repayment breakdown.
• Pregnancy Due Date Calculator — Find your estimated due date from LMP, conception, ultrasound, or IVF transfer date.
• Rent vs Buy Calculator — Monte Carlo rent vs buy analysis with 5,000 scenarios, full US tax modeling (SALT cap, standard vs itemized, capital gains exclusion), and opportunity cost o…
• Retirement & FIRE Calculator — Monte Carlo retirement planning with 5,000 simulations.
• Salary Calculator — Convert hourly wage to yearly salary or annual to hourly.
• SIP Calculator — Calculate future value of your monthly SIP investments with compound returns.
• Stripe Fee Calculator — Calculate Stripe fees for any transaction across 20 countries — cards, ACH, SEPA, Apple Pay, Klarna, Connect, Subscriptions, Refunds, and Disputes.
• Swim Time Converter — Convert competitive swim times between Short Course Yards (25y), Short Course Meters (25m), and Long Course Meters (50m) with stroke- and distance-specific f…
• Weighted Grade Calculator — Track your full syllabus across a semester.

• Backlight Bleed Test — Check your LCD or OLED monitor for backlight bleeding and IPS glow using a pure black fullscreen display.
• Black Screen — Pure black fullscreen for OLED backlight testing, burn-in prevention, dark backdrop for photography, and reducing eye strain.
• Blue Screen — Pure blue (#0000FF) fullscreen for blue subpixel testing, display color calibration, and photography backdrop.
• Color Gradient Test — Test your monitor for color banding and 8-bit vs 10-bit depth with smooth gradients across grayscale, red, green, blue, and hue channels.
• Dead Pixel Test — Cycle through 8 solid colors to find stuck or dead pixels on any monitor, TV, or phone screen.
• Digital Lightbox — Turn your monitor into a bright tracing light panel with adjustable brightness and color temperature for artists and photographers.
• Focus Mode — Distraction-free fullscreen with a Pomodoro timer, synthesized ambient sounds, and customizable solid-color background for deep work.
• Green Screen — Chroma key green fullscreen for virtual backgrounds, video production, and green subpixel color accuracy testing.
• Monitor Test — All-in-one display diagnostic: dead pixels, color accuracy, gradients, sharpness, backlight uniformity, and geometry.
• Red Screen — Pure red (#FF0000) fullscreen for red subpixel testing, color channel isolation, night-vision preservation, and photography lighting.
• Refresh Rate Test — Measure your display's actual refresh rate with requestAnimationFrame, test motion smoothness, and compare 60/120/144/240 Hz visually.
• Resolution Test — Detect your browser's effective resolution and DPR, test 1px grid sharpness, and check geometric accuracy with concentric circles.
• Screen Cleaner — Disable touch input and cycle white, black, and gray backgrounds to safely wipe dust and smudges off your display.
• WCAG Contrast Checker — Real-time WCAG 2.1 AA/AAA + APCA contrast checker.
• Webcam Light — Use your monitor as a soft fill light for Zoom, Teams, and Google Meet with adjustable brightness and color temperature.
• White Screen — Pure white fullscreen display for monitor cleaning, brightness testing, webcam fill light, and use as a portable lightbox.

• Audio Joiner — Free online audio joiner.
• Audio Trimmer — Cut and trim audio files with a visual waveform editor.
• Case Converter — UPPER, lower, Title, camelCase, snake_case, kebab-case.
• Diff Checker — Compare two files for visual differences.
• Markdown Editor — Live preview markdown rendering engine.
• Morse Code Translator — Convert text to Morse code and back — with audio playback, WAV download, and image export.
• PDF Tools — Merge multiple PDFs or extract pages — all in your browser.
• Readability — Flesch-Kincaid score and text analysis.
• SQL Formatter — Format, beautify, and minify SQL queries online.
• Typing Speed Test — Free WPM typing test with 15s, 30s, 1min, 2min, and 5min durations.
• URL Encoder/Decoder — Encode and decode URLs using percent-encoding.
• Word Counter — Real-time character, word, and paragraph analysis.
• XML Formatter — Format, minify, and validate XML.
• YAML Formatter — Format and validate YAML.

• Base64 — Encode and decode Base64 strings instantly.
• Cron Builder — Visual builder for cron-job schedules.
• EXIF Viewer — View and remove EXIF metadata, GPS location, camera settings, and privacy data from photos — free, private, runs in your browser.
• Hash Generator — Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files.
• HTML Entity — Encode special chars to HTML entities and decode back.
• JSON Formatter — Clean, minify, and validate JSON data structures.
• JSON Validator — Validate JSON syntax and get precise error messages with line numbers.
• JWT Decoder — Decode and inspect JWT tokens — header, payload, timestamps.
• Multi-Tenant JWT Debugger — Inspect B2B SaaS JWTs — tenant context, scoped permissions, provider conventions (Clerk, WorkOS, Auth0, Supabase, Stack Auth, Firebase, Cognito), comparison,…
• Password Gen — Highly secure, random entropy generation.
• Regex Tester — Real-time expression matching and testing.
• SEO Audit — Audit any URL's on-page SEO — meta tags, headings, images, links, schema, Open Graph, and Twitter Cards in seconds.
• Unix Timestamp — Unix timestamps to human dates, multiple timezones.

• AI Coding Rules — Curated rules-file library and generator for Cursor, Claude Code, GitHub Copilot, Windsurf, Cline, Aider, Continue, and Cody.
• GPU VRAM Calculator for LLMs — Estimate GPU VRAM for running or fine-tuning open LLMs — Llama, Mistral, Qwen, DeepSeek, Gemma, Phi.
• RAG Cost Calculator — End-to-end RAG pipeline cost — Embedding · Storage · Retrieval · Generation.
• Vector Database Cost Calculator — Compare monthly cost across Pinecone, Weaviate, Qdrant, Milvus, Chroma, MongoDB Atlas, and self-hosted pgvector.

• Planning Poker — Free real-time planning poker for Scrum and agile teams.
• Vim Adventure — Learn Vim by playing.