Developer Tools

Browse 91 free dev tools. All tools are free, instant, and require no signup.

Essential tools for software developers. Generate UUIDs, format JSON/SQL, encode/decode Base64, test regex patterns, calculate hashes, and debug JWT tokens.

All Dev Tools

• .gitignore Generator - Generate comprehensive .gitignore files for any project by selecting your OS, IDE, and languages
• Advanced Case Converter - Developer-focused text transformation. Convert variables between camelCase, snake_case, PascalCase, and more.
• AI Feature Creep Guillotine - AI identifies the 20% of features consuming 80% of your time so you can cut them and actually ship
• AI Token Counter - Count the exact number of tokens in your text for GPT-4, Claude, and Gemini. Essential for developers and AI users to estimate API costs and context window usage accurately.
• AI Tool Cost Comparison Calculator - Compare the real usage costs of ChatGPT, Claude, Gemini, and other AI tools — estimate monthly spend based on your usage patterns and subscription tiers
• API Pricing Calculator - Compare API pricing models and estimate costs
• AWS Cost Calculator - Estimate monthly AWS costs for EC2 instances, S3 storage, Lambda functions, RDS databases, and data transfer
• Bandwidth Calculator - Calculate file transfer time, convert between bandwidth units (bps, Kbps, Mbps, Gbps), and estimate data usage
• Base Converter (Radix) - Convert numbers between Binary, Octal, Decimal, Hexadecimal, and custom bases (2-36).
• Border Radius Preview - Visual editor for CSS border-radius. Manipulate all 4 corners to create organic shapes.
• Box Shadow Generator - Create smooth CSS box shadows visually. Customize offsets, blur, spread, and colors.
• Browser Fingerprint Camouflage Tool - See what makes your browser unique and get suggestions for common settings that help you blend in.
• Browser Fingerprint Checker - See how unique your browser fingerprint is and get tips to reduce online tracking
• CCTV Storage Estimator - Calculate hard drive size needed based on camera count, resolution, FPS, and retention days
• Chmod Calculator - Visual permission calculator for Unix file systems. Converts between checkboxes, octal, and symbolic notation.
• Cloud Cost Comparison (AWS vs GCP vs Azure) - Compare cloud computing costs across AWS, Google Cloud, and Microsoft Azure to find the most cost-effective provider for your workloads
• Cloud Hosting Cost Forecaster - Estimate cloud hosting costs based on your traffic — project AWS, GCP, or Azure bills from page views, storage, and bandwidth needs
• Cloud Storage Cost Estimator - Estimate monthly cloud storage costs based on data size, access patterns, and storage tier
• Color Contrast Checker - Calculate contrast ratios between two colors to ensure WCAG accessibility compliance.
• Color Picker & Converter - Pick colors visually and convert between HEX, RGB, HSL, and CMYK formats with palette generation.
• Color Picker & Eyedropper - Pick any color from your screen using the browser's native EyeDropper API, or enter colors manually. View and copy color values in HEX, RGB, HSL formats instantly.
• Cron Expression Generator - Visual builder for cron schedules. Convert human-readable time settings into standard cron syntax.
• Cron Expression Parser - Parse cron expressions into plain English, see next run times, and visualize the schedule with common presets
• CSS Glassmorphism Generator - Create frosted glass UI effects with adjustable blur, transparency, and border settings. Generate cross-browser compatible CSS.
• CSS Gradient Generator - Create beautiful linear gradients visually and get the CSS code instantly.
• CSS Minifier - Minify CSS code by removing whitespace, comments, and unnecessary characters. Shows compression ratio.
• CSS Triangle Generator - Generate pure CSS triangles using the border property hack. Customize size, color, and direction.
• CSV to JSON Converter - Convert CSV text into a structured JSON array. Handles headers and basic types.
• Data Breach Cost Estimator - Calculate the estimated financial impact of a data breach based on industry, region, data type, and response time
• Domain Name Valuation Tool - Estimate the market value of domain names based on length, TLD, keywords, and other valuation factors
• Dot to Pixel Converter - Convert physical size units like Points (pt) or DP to screen pixels (px) based on density.
• Email Deliverability DNS Checker - Check SPF, DKIM, and DMARC DNS records to improve email deliverability and avoid spam folders
• Excel Formula Explainer - Paste a confusing spreadsheet formula and get a plain-English explanation of what it does
• Favicon Generator - Create simple emoji or text-based favicons and download them as PNGs.
• Flexbox Playground - Interactive visualizer for CSS Flexbox properties. Generate layout code instantly.
• GDPR Fine Calculator - Calculate potential GDPR fines based on violation severity and company revenue
• Git Command Helper - Describe what you want to do in Git and get the exact command to run
• Grid Layout Generator - Visual CSS Grid builder. Define columns, rows, and gaps to generate production-ready code.
• How Much Does a Website Actually Cost? - AI-powered estimate of website development and ongoing maintenance costs based on your requirements
• HTML Entity Encoder - Convert special characters to their corresponding HTML entities and vice-versa.
• HTML to Markdown - Convert HTML to clean, readable Markdown instantly.
• IP Subnet Calculator - Calculate IP range, subnet mask, and available hosts from a CIDR network address.
• Is This Software Worth the Price? - AI analysis to evaluate whether a software tool or SaaS subscription provides good ROI for your needs
• JSON Beautifier - Clean, validate, and format JSON objects with syntax error reporting.
• JSON Formatter & Validator - Format, validate, minify, and explore JSON data with syntax highlighting, error detection, and structure analysis
• JSON Minifier - Compress JSON data by removing unnecessary whitespace to reduce file size.
• JWT Decoder - Decode JSON Web Tokens to inspect headers and payloads without verification. Client-side only.
• Keycode Event Info - Interactive key press visualizer showing JavaScript event codes, keys, and modifier states.
• llms.txt Generator - Generate llms.txt files to help AI language models understand your website following the official specification
• Markdown Table Generator - Create standard Markdown tables easily with a visual grid editor.
• Markdown to HTML - Convert Markdown to clean HTML code instantly.
• Meta Tag Generator - Generate standard HTML meta tags for SEO and Social Media sharing cards.
• Neumorphism Shadow Generator - Generate soft UI shadow effects with light/dark shadows calculated from background color and light source angle
• Notion Progress Bar Formula Generator - Generate Notion formula code for visual progress bars in your databases
• Obsidian Callout Generator - Generate Obsidian markdown callout syntax for notes, warnings, tips, and more
• Placeholder Image Generator - Generate custom placeholder image URLs with specified dimensions and effects for development.
• QR Code Data Capacity Calculator - Check if your data fits in a given QR code version before printing
• RAID Storage Calculator - Calculate usable storage capacity for RAID 0, 1, 5, 6, and 10 configurations
• Random String Generator - Generate random strings with custom length and character sets. Perfect for API keys, tokens, and unique identifiers.
• Regex Explainer - Convert complex regular expressions into plain English explanations
• Regex Generator - Describe a text pattern in plain English and get the matching regular expression
• Regex Sandbox - Live regular expression playground with real-time match highlighting.
• Robots.txt Generator - Create a standard robots.txt file to control search engine crawlers on your website.
• Screen Resolution Detector - Instantly detect your screen resolution, viewport size, device pixel ratio, and color depth. Essential for developers testing responsive designs and users checking display specifications.
• Screen Resolution Simulator - Visualize viewport dimensions for common devices.
• Screen Ruler - On-screen pixel ruler for measuring elements on your display with drag-to-measure
• SEO Traffic Value Estimator - Calculate the equivalent ad spend value of your organic search traffic — see what your SEO efforts are worth in paid advertising dollars
• SOC 2 Audit Cost Estimator - Estimate SOC 2 audit costs based on company size, complexity, and audit type
• SQL Formatter - Beautify and standardize your SQL queries with proper indentation and keyword capitalization.
• SQL Query Generator - Describe what data you need in plain English and get the SQL query to retrieve it
• SSL Certificate Expiry Checker - Check when your SSL/TLS certificate expires and get alerts before it's too late
• Stack Trace Explainer - Paste a code error or stack trace and get a plain-English summary of the likely cause and fix
• String Obfuscator - Convert text into various formats like Base64, Hex, and ROT13 for basic obfuscation or data transport.
• Stripe Fee Calculator (Advanced) - Calculate Stripe payment processing fees with support for international cards, currency conversion, ACH, instant payouts, and reverse calculations
• SVG Optimizer - Remove bloat from SVG files - strip metadata, comments, and unnecessary code for smaller file sizes
• Tailwind CSS Config Generator - Generate complete Tailwind CSS color palettes from a single brand color with all shades (50-950)
• Terminal Output Cleaner - Strip ANSI escape codes, box-drawing characters, control sequences, and shell formatting from any copy-pasted terminal, TUI, or CLI output. Get clean plain text instantly.
• Unix Timestamp Converter - Convert between Epoch timestamps and human-readable dates instantly.
• URL Parser - Deconstruct standard URLs into components like protocol, hostname, path, and query parameters.
• URL Slug Generator - Convert regular text into SEO-friendly URL slugs by cleaning characters and spaces.
• User Story Generator - Enter a feature name and generate Agile user stories with acceptance criteria
• UTM Link Builder - Add tracking parameters to your URLs to measure marketing campaign performance in analytics.
• UUID Generator - Generate cryptographically strong Version 4 UUIDs in bulk for database keys or unique identifiers.
• UUID V5 Generator - Generate deterministic UUIDs using a namespace identifier and a name string (SHA-1 hashing).
• UUID/GUID Generator - Generate random UUIDs (Universally Unique Identifiers) and GUIDs. Supports v4 random UUIDs with bulk generation.
• Vibe-Code Stress Tester - Paste AI-generated code and get a Fragility Score — identifies hallucinations, security holes, and scalability issues before they break your app
• Website Downtime Allowance Calculator - Calculate how much downtime your SLA allows based on uptime percentage (99.9%, 99.99%, etc.)
• Website Speed Impact on Revenue Tool - Estimate how page load time affects your conversion rate and revenue — see the real cost of a slow website based on industry research
• Website Valuation Calculator - Estimate your website's value using profit multiples, revenue analysis, and traffic-based valuation methods
• What Is My User Agent - Instantly view your browser's User Agent string. Essential for developers and support teams to debug browser-specific issues and identify device details.
• YAML ↔ JSON Converter - Convert between YAML and JSON formats instantly. Paste YAML to get JSON or JSON to get YAML.