Web Tools Catalog
A structured collection of free browser utilities — writing inspectors, converters, and developer tools. No sign-up, no ads, instant results.
UI & Frontend Web Design Tools
- HTML Color Picker & ConverterInteractive client-side color picker with real-time conversion between HEX, RGB, HSL, HSV, and CMYK.
- Random Color Palette GeneratorGenerate cohesive 5-color palettes instantly with spacebar lock-and-roll functionality.
- CSS Gradient GeneratorVisual editor to create linear, radial, and conic CSS background gradients with copy-ready code.
- Curated Color Palettes LibraryBrowse, filter, and search hundreds of curated 4-color palettes for web design and UI projects.
- CSS Grid & Flexbox Layout GeneratorInteractive visual builder for CSS Grid and Flexbox layouts with instant CSS code generation.
- CSS Box Shadow & Border Radius GeneratorVisual tool for customizing CSS box shadows, text shadows, and border-radius with live preview.
- Developer Icon Cheat Sheet & FinderSearch, preview, and copy SVG and icon class names for popular web icon libraries.
Developer Utilities
- JSON Formatter & ValidatorFormat, beautify, validate, and minify JSON data with real-time line and column syntax error detection.
- JSON Tree Editor & VisualizerInteractive tree view editor, key-value inspector, and structure visualizer for complex JSON payloads.
- JWT Decoder & InspectorDecode JSON Web Tokens (JWT) header, payload claims, and expiration dates instantly in browser memory.
- RegEx Tester & DebuggerTest, build, and debug Regular Expressions with real-time match highlighting, group breakdowns, and flags.
- Base64 Encoder & DecoderEncode and decode text strings and binary data into Base64 format securely without server uploads.
- URL Encoder & DecoderPercent-encode URI special characters or decode encoded query parameters and URL components.
- HTML Formatter & CleanerBeautify unformatted HTML code with customizable options to strip inline styles, scripts, or comments.
- SQL Query FormatterFormat and indent complex SQL queries with automatic uppercase keyword transformations and line alignment.
- Code Format TransformerConvert JSON to TypeScript interfaces, SVG to React JSX components, and HTML to clean Markdown.
- CSV to JSON & JSON to CSV ConverterConvert spreadsheet CSV data to structured JSON arrays and transform JSON objects into exportable CSV files instantly.
- XML to JSON & JSON to XML ConverterBidirectional client-side XML and JSON converter supporting nested trees, attributes, and formatted indentation.
- YAML to JSON & JSON to YAML ConverterConvert Kubernetes configs and docker-compose YAML into JSON, and serialize JSON objects into clean YAML.
- HTML Table to Markdown & CSV ConverterPaste HTML <table> markup or website tables to extract clean Markdown tables, CSV data, or JSON arrays.
- cURL Command to Fetch, Axios & Python ConverterConvert terminal cURL requests into production-ready JavaScript Fetch, Axios, Python Requests, and Go code snippets.
- JSON to TypeScript & Zod Schema GeneratorGenerate strongly-typed TypeScript interfaces, type aliases, and Zod validation schemas directly from raw JSON objects.
- Linux Chmod Permissions & Octal CalculatorVisual Linux file permissions calculator converting between Read/Write/Execute checkboxes, octal numbers (755, 644), and symbolic codes.
- User Agent String & Client Hints DetectorInspect your current browser User Agent string or paste any UA string to detect the browser version, OS, rendering engine, and device type.
- HTTP Status Code & Response Header InspectorComprehensive search and reference guide for all standard 1xx, 2xx, 3xx, 4xx, and 5xx HTTP status codes and response headers.
Writing & Text Inspection
- Grammar & Spelling CheckerClient-side rule engine detecting typos, double words, passive voice, and punctuation errors in real-time.
- Hemingway & Readability EditorFlesch-Kincaid readability scoring with sentence complexity color highlights and style metrics.
- AI Content DetectorPattern and burstiness analyzer flagging AI writing signatures, perplexity scores, and repetitive phrasing.
- Word CounterReal-time character, word, sentence, paragraph, and estimated reading/speaking time counter with keyword density.
- Character CounterReal-time character counts and social media limit progress bars for X/Twitter, LinkedIn, Meta, and SMS.
- Case ConverterConvert text instantly between UPPERCASE, lowercase, Title Case, camelCase, PascalCase, snake_case, and kebab-case.
- Online NotepadAuto-saving plain text editor utilizing local browser storage to keep your notes safe offline.
- Markdown Live PreviewReal-time dual-pane Markdown editor with rendered HTML preview and quick copy controls.
- Text Compare & Diff ToolSide-by-side text diff checker highlighting inserted, deleted, and modified lines in real-time.
- Plagiarism & Duplicate CheckerAnalyzes internal duplicate sentences, phrase repetitions, and uniqueness percentages locally.
- Lorem Ipsum GeneratorGenerates dummy text paragraphs, words, and HTML lists for design layouts and wireframes.
- HTML Entity Encoder & DecoderConvert special characters to HTML entities and decode numeric or named character references in real-time.
- URL Slug Generator & PermalinkerGenerate SEO-friendly kebab-case URL slugs with automatic diacritic stripping, symbol removal, and case normalization.
- String Obfuscator & ROT-47 ScramblerScramble and obfuscate sensitive text or email addresses using ROT-47, hex encoding, and JS string obfuscation.
- Whitespace, Blank Line & Tab CleanerStrip trailing spaces, remove repeated blank lines, convert tabs to spaces, and normalize uneven text line breaks.
- List Alphabetizer, Deduplicator & SorterSort lists alphabetically, numerically, by string length, deduplicate repeated items, and reverse line ordering.
- Text to ASCII Art & Figlet Banner MakerTransform plain text strings into stylized ASCII art banners and monospace terminal headers.
- Bcrypt Hash Generator & VerifierGenerate and test salted bcrypt password hashes with configurable work factor rounds locally in your browser.
- RSA Key Pair & PEM Certificate GeneratorGenerate cryptographically secure RSA public and private key pairs (2048-bit / 4096-bit) in PEM format using Web Crypto.
- Apache & Nginx HTPASSWD GeneratorGenerate secure .htpasswd user credential entries using Bcrypt, SHA-1, or MD5 algorithms for Apache and Nginx web servers.
Translation & Converters
- Multi-Language Text TranslatorClient-side multi-language translation engine featuring offline dictionary lookup and Text-to-Speech audio.
- Text & Cipher TranslatorConverts text to Morse Code, 8-bit Binary ASCII, ROT13 cipher, and Pig Latin.
- Unit ConverterConverts Length, Weight, Volume, Area, Temperature, and Speed with interactive all-in-one matrix reference tables.
Calculators & Counters
- Sleep Calculator90-minute natural sleep cycle calculator determining optimal bedtimes and wake times to prevent morning grogginess.
- Web CounterClient-side tally tool and digital counter with session saving and keyboard shortcuts.
- Percentage, Discount & Markup CalculatorCalculate percentage increases, percentage differences, store discounts, sales margins, and tip splits in real-time.
- Loan & Mortgage Amortization CalculatorCalculate monthly mortgage and loan payments, total interest costs, and generate interactive year-by-year amortization schedules.
- Compound Interest & Investment CalculatorForecast long-term wealth growth with customizable periodic contributions, compound intervals, and interactive year-by-year projection tables.
- Age & Date Difference CalculatorCalculate exact age down to days, hours, and minutes, compute elapsed duration between two calendar dates, and count business workdays.
- BMI, BMR & Caloric Expenditure CalculatorCalculate Body Mass Index (BMI), Basal Metabolic Rate (BMR via Mifflin-St Jeor), and Total Daily Energy Expenditure (TDEE).
- Time Zone Meeting Planner & World ClockCompare working hours across multiple global cities simultaneously and find overlapping business hours for team meetings.
- Running Pace & Split Time CalculatorCalculate running pace per mile or kilometer, predict race finish times (5K, 10K, Half, Marathon), and generate custom mile splits.
- Sales Tax, VAT & Reverse Gross/Net CalculatorCalculate total cost with sales tax, extract net price before tax (reverse VAT), and compute multiple combined tax rates.
- Scientific Calculator & Function EvaluatorPerform advanced algebraic, trigonometric, logarithmic, and exponential calculations with history logging and degree/radian toggles.
Network & Webmaster Utilities
- IPv4 & CIDR Subnet CalculatorCalculate network address, broadcast address, subnet mask, usable host range, and total IPs from any IP and CIDR prefix.
- Cron Expression Parser & Schedule ExplainerParse standard 5-part and 6-part cron expressions into plain human-readable schedules with upcoming run time projections.
- Unix Timestamp & Epoch ConverterConvert Unix epoch timestamps in seconds, milliseconds, and microseconds to UTC, ISO-8601, and local timezone formats.
- CSS PX to REM & Viewport ConverterConvert pixels to REM, EM, and viewport units (VW/VH) with configurable root base font size and live CSS snippet generation.
- Aspect Ratio & Screen Resolution CalculatorCalculate standard display ratios (16:9, 4:3, 21:9), scale dimensions without distortion, and compute image PPI/DPI metrics.
Security & Hashes
- MD5, SHA-256 & SHA-512 Hash GeneratorGenerate cryptographic MD5, SHA-1, SHA-256, and SHA-512 hashes locally in your browser using the native Web Crypto API.
- UUID / GUID v4 Batch GeneratorGenerate cryptographically secure UUID v4 identifiers individually or in bulk with custom formatting options.
- Strong Password Generator & Entropy MeterGenerate secure, random passwords with customizable length, symbols, phonetic readability, and real-time entropy calculation.
- Random String, Token & Number GeneratorGenerate cryptographically secure random strings, alphanumeric tokens, PINs, and random number sequences.
PDF & Document Utilities
- PDF Merge & Split UtilityMerge multiple PDF files into one or extract specific page ranges securely in your browser without uploading.
- Online PDF Compressor & OptimizerCompress PDF file sizes client-side by re-encoding embedded stream objects and removing redundant metadata.
- PDF to Text ExtractorExtract text, paragraphs, and raw readable content from PDF files instantly in your browser.
- Client-Side PDF Form Filler & ViewerInspect, fill out interactive PDF form fields (AcroForms), and export filled documents without third-party tools.
Image & Canvas Utilities
- Online Image Compressor & OptimizerCompress and optimize JPEG, PNG, and WebP images locally in your browser with real-time quality preview and zero server uploads.
- Bulk Image Resizer & CropperBatch resize, scale, crop, and convert image dimensions by exact pixels or percentage with aspect ratio constraints.
- SVG Optimizer & MinifierClean, sanitize, minify, and strip redundant metadata from SVG vector files to reduce file size.
- Favicon & App Icon GeneratorConvert any image or text/emoji into multi-resolution favicons, Apple touch icons, and web manifest assets.
- EXIF Metadata Stripper & InspectorView hidden camera settings, GPS coordinates, and device timestamps, then remove all EXIF metadata for privacy before sharing.
Sharing, Barcodes & QR Utilities
- QR Code Generator & StylerGenerate custom, high-resolution QR codes with customizable colors, error correction, embedded logos, and SVG/PNG export.
- Online Barcode GeneratorGenerate standard linear barcodes including Code 128, EAN-13, UPC-A, and Code 39 for inventory, packaging, and retail.
- QR Code Scanner & Image ReaderScan and decode QR codes instantly using your device webcam or by uploading image files directly in your browser.
- Wi-Fi QR Code & Sign GeneratorCreate printable Wi-Fi sign-in QR codes allowing guests and phones to connect to your network instantly without typing passwords.
- vCard Contact QR Code GeneratorGenerate digital business card QR codes (.vcf) that import full contact names, phones, emails, and addresses into smartphone address books.
- WhatsApp & SMS Click-to-Chat Link GeneratorBuild direct click-to-chat WhatsApp (wa.me) and SMS links with pre-filled messages and companion QR codes.
- UTM Campaign Link Builder & StripperGenerate sanitized Google Analytics campaign tracking URLs (UTM tags) and strip invasive tracking parameters from links.
Audio, Video & Canvas Media
- Client-Side Audio Trimmer & CutterCut, trim, and splice MP3, WAV, and AAC audio files locally in your browser with interactive visual waveform preview.
- Online Voice Recorder & Audio CaptureRecord crystal-clear audio from your microphone directly in the browser with live volume meter and instant WAV/WebM export.
- Screen & Webcam Video RecorderRecord your desktop screen, active browser tab, or webcam stream with audio and export high-quality WebM/MP4 video.
- BPM Counter & Tap Tempo MeterCalculate musical beats per minute (BPM) by tapping to the rhythm on keyboard or touch screen with timing stability analytics.
- Tone & Frequency Generator (Binaural Beats)Generate pure sine, square, triangle, and sawtooth test audio frequencies, binaural beats, and pink/white noise in real time.
- Meme & Banner Canvas GeneratorCreate custom memes and social banners with top/bottom impact text, custom fonts, stickers, and instant PNG export.
- WCAG Color Contrast Accessibility CheckerTest foreground and background color combinations against WCAG 2.1 guidelines for AA and AAA compliance ratios.
- Image Color Palette & Swatch ExtractorExtract dominant color schemes, hex codes, and color swatches from any uploaded photo using client-side canvas clustering.
Productivity & Everyday Utilities
- Pomodoro Focus Timer & ChimeStay focused with customizable Pomodoro work intervals, break timers, live browser title updates, and Web Audio chimes.
- Precision Stopwatch & Lap CounterHigh-precision millisecond stopwatch with lap tracking, fastest/slowest lap highlights, keyboard shortcuts, and CSV export.
- Habit Tracker & Heatmap GridTrack daily habits with GitHub-style 52-week activity heatmaps, streak calculations, and local backup export.
- Client-Side Kanban Task BoardOrganize tasks with interactive HTML5 drag-and-drop Kanban columns, priority tagging, and automatic local storage persistence.
- Decision Wheel & Random PickerSpin a custom decision wheel with physical deceleration, celebratory confetti, animated 3D dice rolling, and coin flipping.
- RSVP Speed Reading TrainerIncrease reading speed using Rapid Serial Visual Presentation (RSVP) with optimal recognition point (ORP) focal highlighting up to 1000 WPM.
- Auto-Saving Note ScratchpadWrite notes and code snippets in a dual-pane scratchpad with auto-save, live word count, search filtering, and Markdown export.
- Multi-Card Tally Counter BoardTrack counts, attendance, or inventory across a grid of customizable counter cards with step sizes, audio clicks, and CSV export.