The In-Browser Developer Workbench

JSON Formatter & Validator Format, minify, and inspect JSON payloads with real-time error pinpoints. Cron Expression Generator Build cron syntax with visual presets and human-readable schedule explanations. JWT Decoder & Debugger Safely decode JWT header and payload claims client-side without sending tokens away. AI Prompt Token Estimator Calculate tokens and cost projections across GPT-4o, Claude 3.5, and Gemini.

No matching utilities found

Try searching for terms like json, base64, markdown, token, uuid, or regex.

AI UTILITIES AI Prompt Cost Calculator Calculate exact API costs for OpenAI GPT-4o, Claude 3.5, and Gemini models based on prompt tokens and output l... Client-side Use Tool → AI UTILITIES AI Prompt Token Estimator & Chunker Estimate prompt token usage across GPT-4o, Claude 3.5, and Gemini models with chunk size recommendations. 100%... Client-side Use Tool → AI UTILITIES AI Embedding & Vector Storage Calculator Calculate vector embedding dimensions, storage RAM requirements, and API generation costs for OpenAI, Cohere, ... Client-side Use Tool → AI UTILITIES OpenAI Structured Outputs JSON Schema Generator Generate strict JSON Schema definitions for OpenAI GPT-4o and Claude structured function calling outputs. 100%... Client-side Use Tool → AI UTILITIES DNS Record & Domain Lookup Lookup DNS records (A, AAAA, CNAME, MX, TXT) and verify domain nameservers via Cloudflare DNS over HTTPS. 100%... Client-side Use Tool →

DEVELOPER TOOLS Text to ASCII and Binary Byte Converter Convert plaintext into 8-bit binary bytes, hexadecimal numbers, and ASCII decimal character codes with real-ti... Client-side Use Tool → DEVELOPER TOOLS Aspect Ratio & Resolution Calculator Calculate screen dimensions, video aspect ratios (16:9, 9:16, 4:3, 1:1), and pixel scaling for responsive web ... Client-side Use Tool → DEVELOPER TOOLS Base64 Encoder & Decoder Encode text to Base64 format or decode Base64 strings back to plain readable text. 100% free, private, and run... Client-side Use Tool → DEVELOPER TOOLS Base64 URL-Safe Encoder & Decoder (RFC 4648) Encode and decode URL-safe Base64 strings replacing plus and slash characters with hyphens and underscores. 10... Client-side Use Tool → DEVELOPER TOOLS Binary to Hexadecimal & Decimal Converter Convert numbers between Binary (Base 2), Octal (Base 8), Decimal (Base 10), and Hexadecimal (Base 16) in real ... Client-side Use Tool → DEVELOPER TOOLS Bulk UUID v4 Generator (Up to 500 IDs) Generate batches of up to 500 cryptographically secure UUID v4 identifiers with uppercase, lowercase, and hyph... Client-side Use Tool → DEVELOPER TOOLS Chmod Permissions Calculator Calculate Linux/Unix file permissions numerically (755, 644) and symbolic notation (rwxr-xr-x) with interactiv... Client-side Use Tool → DEVELOPER TOOLS IPv4 CIDR Subnet & IP Range Calculator Calculate subnet masks, usable host IP ranges, broadcast IPs, and wildcard masks for IPv4 CIDR blocks (/8 to /... Client-side Use Tool → DEVELOPER TOOLS Base64 Safe Config Encoder Fast browser-based base64 safe config encoder with 100% client-side privacy, instant execution, and zero ads. Client-side Use Tool → DEVELOPER TOOLS Realtime Config Diff Inspector Fast browser-based realtime config diff inspector with 100% client-side privacy, instant execution, and zero a... Client-side Use Tool → DEVELOPER TOOLS Cron Expression Generator & Explainer Generate and decode standard cron schedule expressions with human-readable explanations and quick presets. 100... Client-side Use Tool → DEVELOPER TOOLS CSV Deduplicator & Whitespace Cleaner Remove duplicate rows from CSV data and clean trailing whitespace while preserving table structure. 100% free,... Client-side Use Tool → DEVELOPER TOOLS CSV to JSON Converter Convert CSV data, Excel rows, and tab-delimited text into formatted JSON arrays instantly in your browser. Client-side Use Tool → DEVELOPER TOOLS cURL to JavaScript Fetch Converter Convert cURL commands into clean modern JavaScript Fetch and Axios API requests with async/await syntax. 100% ... Client-side Use Tool → DEVELOPER TOOLS cURL to Python Converter Convert cURL commands into clean Python requests code, headers, and payloads instantly in your browser. Client-side Use Tool → DEVELOPER TOOLS .env to JSON Environment Converter Convert .env key-value variables into formatted JSON configuration objects and JavaScript process.env definiti... Client-side Use Tool → DEVELOPER TOOLS Hash Generator (MD5, SHA-256) Generate secure cryptographic hash strings using MD5, SHA-1, SHA-256, and SHA-512. 100% free, private, and run... Client-side Use Tool → DEVELOPER TOOLS Hex to RGB and HSL Color Converter Convert Hex color codes to RGB, RGBA, and HSL formats instantly with live visual color previews and 1-click co... Client-side Use Tool → DEVELOPER TOOLS HTML Entity Encoder & Decoder Convert special characters, symbols, and quotes into safe HTML entities (&, <, >) to prevent XSS and... Client-side Use Tool → DEVELOPER TOOLS HTML Minifier & Compressor Minify HTML documents and component templates. Remove comments, whitespace, and line breaks to optimize DOM lo... Client-side Use Tool → DEVELOPER TOOLS HTML Table & CSS Styler Generator Create custom HTML tables with headers, striped rows, and clean responsive CSS styling with live visual previe... Client-side Use Tool → DEVELOPER TOOLS HTML to React JSX Component Converter Transform HTML markup into clean React and Next.js JSX syntax with automated class to className, self-closing ... Client-side Use Tool → DEVELOPER TOOLS HTTP Status Code Reference & Debugger Instant lookup and debugging guide for all HTTP status codes (1xx-5xx) with RFC specifications and troubleshoo... Client-side Use Tool → DEVELOPER TOOLS JSON Difference & Key Comparator Compare two JSON objects side-by-side to detect added, removed, and modified keys with syntax highlighting. 10... Client-side Use Tool → DEVELOPER TOOLS JSON Object Flattener & Unflattener Flatten deep nested JSON objects into dot-notation paths and unflatten dot-notation back into nested JSON. 100... Client-side Use Tool → DEVELOPER TOOLS JSON Formatter & Validator Format, validate, and beautify JSON data instantly with syntax highlighting and tree view. 100% free, private,... Client-side Use Tool → DEVELOPER TOOLS JSON Minifier & Compact Formatter Compress and minify JSON data by stripping whitespace, newlines, and indentation to reduce payload transfer si... Client-side Use Tool → DEVELOPER TOOLS JSON to CSV & Excel Exporter Convert JSON arrays and API responses into downloadable CSV spreadsheets and tables with proper column escapin... Client-side Use Tool → DEVELOPER TOOLS JSON to .env Configuration Converter Convert JSON configuration objects into clean .env environment variable files with proper key escaping. 100% f... Client-side Use Tool → DEVELOPER TOOLS JSON to TypeScript Interface Generator Transform JSON sample responses into strongly typed TypeScript interfaces with automatic type inference. 100% ... Client-side Use Tool → DEVELOPER TOOLS JSON to YAML Data Converter Convert JSON payloads into clean, formatted YAML configuration syntax with custom indentation. 100% free, priv... Client-side Use Tool → DEVELOPER TOOLS JWT Decoder & Debugger Decode and inspect JSON Web Tokens (JWT) headers, payloads, and claims client-side without sending tokens to a... Client-side Use Tool → DEVELOPER TOOLS JWT Signature & HMAC-SHA256 Secret Verifier Verify JSON Web Token signatures with your HMAC-SHA256 secret key locally in your browser using the Web Crypto... Client-side Use Tool → DEVELOPER TOOLS Base64 Safe Manifest Encoder Fast browser-based base64 safe manifest encoder with 100% client-side privacy, instant execution, and zero ads... Client-side Use Tool → DEVELOPER TOOLS Multi Base Manifest Radix Calculator Fast browser-based multi base manifest radix calculator with 100% client-side privacy, instant execution, and ... Client-side Use Tool → DEVELOPER TOOLS Realtime Manifest Diff Inspector Fast browser-based realtime manifest diff inspector with 100% client-side privacy, instant execution, and zero... Client-side Use Tool → DEVELOPER TOOLS Base64 Safe Payload Encoder Fast browser-based base64 safe payload encoder with 100% client-side privacy, instant execution, and zero ads.... Client-side Use Tool → DEVELOPER TOOLS Multi Base Payload Radix Calculator Fast browser-based multi base payload radix calculator with 100% client-side privacy, instant execution, and z... Client-side Use Tool → DEVELOPER TOOLS Realtime Payload Diff Inspector Fast browser-based realtime payload diff inspector with 100% client-side privacy, instant execution, and zero ... Client-side Use Tool → DEVELOPER TOOLS QR Code Generator Generate free high-resolution QR codes for websites, text, contact cards, and Wi-Fi credentials. Download high... Client-side Use Tool → DEVELOPER TOOLS Regex Pattern Library & Live Matcher Browse production-ready Regular Expressions for emails, URLs, IP addresses, strong passwords, dates, and test ... Client-side Use Tool → DEVELOPER TOOLS Regex Tester & Cheat Sheet Test regular expressions in real-time with instant match highlighting, capture group breakdown, and standard r... Client-side Use Tool → DEVELOPER TOOLS RGB to HSL & HSV Color Converter Convert RGB color values to HSL and HSV representations with live color preview and 1-click CSS copying. 100% ... Client-side Use Tool → DEVELOPER TOOLS ROT13 & Caesar Cipher Encoder / Decoder Encrypt and decrypt text with ROT13, Caesar shifts, and ROT47 algorithms in real-time. 100% free, private, and... Client-side Use Tool → DEVELOPER TOOLS SQL Formatter & Beautifier Format and beautify messy SQL queries with proper keyword indentation, uppercase keywords, and clean line brea... Client-side Use Tool → DEVELOPER TOOLS SQL to JSON Schema & Record Converter Convert SQL CREATE TABLE definitions and INSERT statements into structured JSON schemas and key-value records.... Client-side Use Tool → DEVELOPER TOOLS Base64 Safe String Encoder Fast browser-based base64 safe string encoder with 100% client-side privacy, instant execution, and zero ads. Client-side Use Tool → DEVELOPER TOOLS Multi Base String Radix Calculator Fast browser-based multi base string radix calculator with 100% client-side privacy, instant execution, and ze... Client-side Use Tool → DEVELOPER TOOLS Realtime String Diff Inspector Fast browser-based realtime string diff inspector with 100% client-side privacy, instant execution, and zero a... Client-side Use Tool → DEVELOPER TOOLS Text & String Multiplier Generator Repeat any text, word, or character sequence N times with customizable delimiters (newlines, commas, pipes). 1... Client-side Use Tool → DEVELOPER TOOLS Unix Timestamp Converter Convert Unix epoch timestamps (seconds & milliseconds) to human-readable date and time. 100% free, private, an... Client-side Use Tool → DEVELOPER TOOLS Unix Timestamp Difference & Duration Calculator Calculate exact days, hours, minutes, and seconds between two timestamps or dates in real time. 100% free, pri... Client-side Use Tool → DEVELOPER TOOLS URL Encoder & Decoder Encode and decode URLs, query parameters, and URI components safely for web applications. 100% free, private, ... Client-side Use Tool → DEVELOPER TOOLS URL Parser & Query Parameter Extractor Parse complex URLs into protocol, hostname, port, pathname, search query parameters, and hash fragments instan... Client-side Use Tool → DEVELOPER TOOLS URL Query Parameter Cleaner & Normalizer Strip tracking UTM parameters, click IDs (fbclid, gclid), and normalize query strings for clean links. 100% fr... Client-side Use Tool → DEVELOPER TOOLS URL Slug Generator & Text Sanitizer Generate clean, SEO-friendly URL slugs from blog titles, headlines, and strings with customizable separators a... Client-side Use Tool → DEVELOPER TOOLS UUID & GUID Generator Generate random Version 4 UUIDs and GUIDs instantly with uppercase and hyphen options. 100% free, private, and... Client-side Use Tool → DEVELOPER TOOLS YAML to JSON Converter Convert YAML configuration files into formatted JSON instantly in your browser with real-time error validation... Client-side Use Tool →

TEXT TOOLS Text Case Converter Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake\_case, and kebab-case. 100% free, priva... Client-side Use Tool → TEXT TOOLS Online Config Line Formatter Fast browser-based online config line formatter with 100% client-side privacy, instant execution, and zero ads... Client-side Use Tool → TEXT TOOLS CSS Text Shadow Generator & Presets Design subtle, glowing, and multi-layered CSS text shadows with live visual preview and code copy. 100% free, ... Client-side Use Tool → TEXT TOOLS CSV to Markdown Table Converter Convert comma-separated values (CSV) and spreadsheet rows into clean GitHub-flavored Markdown tables instantly... Client-side Use Tool → TEXT TOOLS Text & Code Diff Checker Compare two text snippets or code files side-by-side with visual line-by-line additions and deletion highlight... Client-side Use Tool → TEXT TOOLS HTML to Plain Text Extractor & Stripper Fast client-side HTML tag stripper that extracts clean, unformatted plain text while decoding entities. Client-side Use Tool → TEXT TOOLS LLM Context Window & Memory Calculator Calculate token usage, remaining context space (128k, 200k, 2M), and KV cache memory requirements across AI mo... Client-side Use Tool → TEXT TOOLS Dummy Image & SVG Placeholder Generator Create custom SVG placeholder dummy images with custom dimensions, background colors, and labels for design mo... Client-side Use Tool → TEXT TOOLS Lorem Ipsum Generator Generate custom placeholder dummy text by paragraphs, sentences, or words for design mockups. 100% free, priva... Client-side Use Tool → TEXT TOOLS Online Manifest Line Formatter Fast browser-based online manifest line formatter with 100% client-side privacy, instant execution, and zero a... Client-side Use Tool → TEXT TOOLS Raw Manifest Plain Text Stripper Fast browser-based raw manifest plain text stripper with 100% client-side privacy, instant execution, and zero... Client-side Use Tool → TEXT TOOLS Markdown Previewer & Editor Write Markdown and see live rendered HTML output instantly with one-click HTML copying. 100% free, private, an... Client-side Use Tool → TEXT TOOLS Markdown Table to JSON Array Converter Convert Markdown tables into structured JSON arrays of objects with automatic type inference (strings, numbers... Client-side Use Tool → TEXT TOOLS Online Payload Line Formatter Fast browser-based online payload line formatter with 100% client-side privacy, instant execution, and zero ad... Client-side Use Tool → TEXT TOOLS Raw Payload Plain Text Stripper Fast browser-based raw payload plain text stripper with 100% client-side privacy, instant execution, and zero ... Client-side Use Tool → TEXT TOOLS Online String Line Formatter Fast browser-based online string line formatter with 100% client-side privacy, instant execution, and zero ads... Client-side Use Tool → TEXT TOOLS Raw String Plain Text Stripper Fast browser-based raw string plain text stripper with 100% client-side privacy, instant execution, and zero a... Client-side Use Tool → TEXT TOOLS Strong Password & Passphrase Generator Generate cryptographically secure, random passwords and passphrases locally in your browser using the Web Cryp... Client-side Use Tool → TEXT TOOLS Text Line Sorter & Deduplicator Sort lists of text alphabetically, numerically, remove duplicate lines, or reverse order instantly. 100% free,... Client-side Use Tool → TEXT TOOLS Word & Character Counter Count words, characters, sentences, paragraphs, and estimate reading time in real-time. 100% free, private, an... Client-side Use Tool →

DESIGN TOOLS Image to Base64 Data URI Converter Convert PNG, JPG, SVG, and WebP images into Base64 Data URI strings for inline CSS and HTML embedding. 100% fr... Client-side Use Tool → DESIGN TOOLS WCAG Color Contrast Ratio Checker Test foreground and background color combinations against WCAG 2.1 AA and AAA accessibility standards. 100% fr... Client-side Use Tool → DESIGN TOOLS Color Picker & HEX Converter Pick colors, generate palettes, and convert between HEX, RGB, and HSL color values. 100% free, private, and ru... Client-side Use Tool → DESIGN TOOLS Hex Color Tint & Shade Palette Generator Generate 10 lighter tints and darker shades from any base hex color with exportable Tailwind/CSS tokens. 100% ... Client-side Use Tool → DESIGN TOOLS CSS Border Radius & Blob Shape Generator Generate smooth 8-point organic blob shapes and rounded corner styles with live visual canvas and 1-click CSS ... Client-side Use Tool → DESIGN TOOLS CSS Box Shadow & Layer Glow Generator Generate smooth multi-layered CSS box-shadows, soft blurs, and neon glows with interactive visual controls. 10... Client-side Use Tool → DESIGN TOOLS CSS Flexbox Layout Generator & Visualizer Interactively build and test responsive CSS Flexbox container and item layouts with real-time CSS code export.... Client-side Use Tool → DESIGN TOOLS CSS Glassmorphism & Frosted Glass Generator Create modern frosted glass UI cards with adjustable blur, background opacity, border styling, and instant CSS... Client-side Use Tool → DESIGN TOOLS CSS Grid Layout & Code Generator Visual interactive CSS Grid generator. Set column counts, row counts, and gaps with instant CSS code preview. ... Client-side Use Tool → DESIGN TOOLS CSS Minifier & Compressor Compress and minify CSS code by stripping whitespace, comments, and redundant formatting. Boost website speed ... Client-side Use Tool → DESIGN TOOLS Hex Manifest Palette Transformer Fast browser-based hex manifest palette transformer with 100% client-side privacy, instant execution, and zero... Client-side Use Tool → DESIGN TOOLS CSS Manifest Layout Visualizer Fast browser-based css manifest layout visualizer with 100% client-side privacy, instant execution, and zero a... Client-side Use Tool → DESIGN TOOLS Hex Payload Palette Transformer Fast browser-based hex payload palette transformer with 100% client-side privacy, instant execution, and zero ... Client-side Use Tool → DESIGN TOOLS CSS Payload Layout Visualizer Fast browser-based css payload layout visualizer with 100% client-side privacy, instant execution, and zero ad... Client-side Use Tool → DESIGN TOOLS PX to REM Converter Convert pixel values (px) to CSS rem and em units instantly with custom root base font size. 100% free, privat... Client-side Use Tool → DESIGN TOOLS Hex String Palette Transformer Fast browser-based hex string palette transformer with 100% client-side privacy, instant execution, and zero a... Client-side Use Tool → DESIGN TOOLS CSS String Layout Visualizer Fast browser-based css string layout visualizer with 100% client-side privacy, instant execution, and zero ads... Client-side Use Tool → DESIGN TOOLS SVG Optimizer & Viewer Minify SVG vector graphics, strip redundant comments and whitespace, and preview rendered vector graphics live... Client-side Use Tool → DESIGN TOOLS SVG to PNG High-Resolution Converter Convert vector SVG graphics into high-resolution PNG images (1x, 2x Retina, 4x Ultra-HD) entirely in your brow... Client-side Use Tool → DESIGN TOOLS Tailwind CSS Palette Generator Generate full 50-950 Tailwind CSS color shade palettes from any hex color with 1-click config export. 100% fre... Client-side Use Tool →

SEO TOOLS Strict Manifest Schema Validator Fast browser-based strict manifest schema validator with 100% client-side privacy, instant execution, and zero... Client-side Use Tool → SEO TOOLS Open Graph & Twitter Meta Tag Generator Generate clean HTML meta tags, Open Graph cards, and Twitter Cards with real-time live preview for social shar... Client-side Use Tool → SEO TOOLS Strict Payload Schema Validator Fast browser-based strict payload schema validator with 100% client-side privacy, instant execution, and zero ... Client-side Use Tool → SEO TOOLS Strict String Schema Validator Fast browser-based strict string schema validator with 100% client-side privacy, instant execution, and zero a... Client-side Use Tool →

Reliable SSD droplets, managed databases, and Kubernetes clusters deployed in seconds. Claim $200 free credit The open source Firebase alternative. Dedicated Postgres DB, instant Auth, and REST/GraphQL APIs. Start free project Protect your developer workstations, APIs, and DNS queries with fast, encrypted tunnels. Get 74% off deal

Affiliate Disclosure: We may earn a commission from partner signups at zero cost to you, which funds our free tools and ad-free hosting.