Free Online Developer Tools
Fast, free, and private. 107 tools for formatting, converting, generating, and designing — all in your browser with zero sign-up.
Developer Tools
View all 20 →Regex Tester & Debugger — Free Online Tool
Test and debug regular expressions with real-time matching, live highlighting, capture groups, and a built-in cheatsheet. Free regex tester with flags support (g, i, m, s)
JWT Decoder & Debugger
Decode and debug JSON Web Tokens online. Verify HS256 & RS256 signatures, check expiration, inspect header & payload claims. 100% client-side.
Diff Checker
Compare two texts and find differences with unified and side-by-side views
SQL Formatter & Beautifier
Format, beautify, and minify SQL queries online. Supports MySQL, PostgreSQL, SQLite, SQL Server, Oracle dialects with configurable indentation and keyword casing
HTML Beautifier & Formatter
Beautify, format, and minify HTML with proper indentation and void element handling
XML Formatter & Validator
Format, validate, beautify, and minify XML online. Syntax highlighting with line numbers, well-formed XML checking with error location, and download as .xml file.
JavaScript Minifier & Beautifier
Minify and beautify JavaScript with safe string, template literal, and regex preservation
Cron Expression Parser
Parse cron expressions into human-readable schedules with next run times and syntax reference
Cron Expression Generator
Build cron expressions visually with dropdowns, preset templates, human-readable descriptions, and next run time previews. Reverse-parse any cron expression
YAML Formatter & Beautifier
Format, beautify, minify, and sort YAML with proper indentation for Kubernetes, Docker, and config files
TOML Formatter & Validator
Format, beautify, minify, sort, and validate TOML files for Cargo.toml, pyproject.toml, and configs
IP Address Lookup & Subnet Calculator
Find your public IP with geolocation, look up any IP address, and calculate subnets with CIDR notation
Unix Timestamp Converter & Epoch Tool
Convert Unix timestamps to human-readable dates and back. Live counter, timezone selector, milliseconds toggle, and common timestamps reference table
HTTP Status Codes Reference
Complete HTTP status codes reference. Search all HTTP response codes from 100 to 511 with descriptions, common use cases, and category filters. Find what 404, 500, 301, 429 and every other status code means
Chmod Calculator
Interactive Unix file permission calculator. Convert between numeric (755, 644) and symbolic (rwxr-xr-x) permissions with checkboxes, common presets, and ready-to-copy chmod commands
HTTP Headers Analyzer
Parse, categorize, and audit HTTP headers with plain-English explanations, security scoring, and export as curl or JSON. Paste raw headers from DevTools or curl.
Markdown to HTML Converter
Convert Markdown to clean HTML online. Live preview, raw HTML view, copy button. Supports headings, tables, code blocks, lists, links, images, blockquotes, horizontal rules. 100% client-side.
Open Graph & Meta Tag Generator
Free Open Graph and meta tag generator. Create og:title, og:description, og:image, Twitter Card tags and more. Live preview shows exactly how your page looks when shared on Facebook, Twitter/X, LinkedIn, Discord, and Slack.
Open Graph & Meta Tag Generator
Generate Open Graph and Twitter Card meta tags instantly. Preview how your page looks when shared on social media. Copy ready-to-paste HTML.
Cron Expression Generator
Free online cron expression generator. Visually build cron schedules with minute/hour/day/month/weekday selectors. See human-readable description and next 5 run times instantly.
Text Tools
View all 7 →Word & Character Counter
Count words, characters, sentences, and paragraphs in your text
Online Markdown Editor & Preview
Free online markdown editor with live preview. Write GitHub Flavored Markdown with tables, task lists, code blocks, and strikethrough. Copy rendered HTML or download as .md file
Text Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and 7 more formats
Unicode Character Map
Browse, search, and copy Unicode characters with code points, HTML entities, and CSS/JS escapes
Emoji Picker & Search
Search and copy 500+ emojis by name, keyword, or category. Click to copy, collect multiple, view Unicode details
Markdown Table Generator
Build Markdown tables visually with a table editor, live preview, CSV/TSV import, column alignment, and one-click copy. GitHub-flavoured Markdown output
Text Diff & Compare
Compare two texts and see differences highlighted side by side. Line-by-line and word-by-word diff with options to ignore whitespace and case. Shows stats for lines added, removed, and unchanged. Free online diff checker.
JSON Tools
View all 7 →JSON Formatter & Validator
Format, validate, beautify, and minify JSON online. Pretty-print with 2-space, 4-space, or tab indentation. Download formatted output as .json.
JSON to CSV Converter
Convert JSON arrays to CSV and CSV back to JSON with nested object flattening and custom delimiters
JSON to YAML Converter
Convert between JSON and YAML formats instantly with bidirectional support
JSON Schema Validator
Validate JSON data against JSON Schema (Draft-07) with detailed error reporting and path navigation
JSONPath Tester
Test and evaluate JSONPath expressions with dot notation, wildcards, array slices, filters, and recursive descent
CSV to JSON Converter
Convert CSV and TSV data to JSON with type detection, nested key unflattening, and RFC 4180 parsing
JSON Tree Viewer
Parse and display JSON as a collapsible tree view with data type color coding, search, and path copying
Image Tools
View all 10 →Image Resizer
Resize images to any dimension with social media presets, percentage scaling, and PNG/JPEG/WebP export
Image Compressor - Reduce File Size Online
Free online image compressor. Reduce JPEG, PNG and WebP file sizes by up to 80%. Batch compress up to 20 images with quality control, format conversion, dimension resize, and before/after preview — all in your browser.
Aspect Ratio Calculator
Calculate and convert aspect ratios for images, videos, and screens with social media and video presets
SVG to PNG Converter
Convert SVG files to PNG, JPEG, or WebP with custom scale, dimensions, and background options
Placeholder Image Generator
Generate placeholder images with custom dimensions, colors, and text. Download as PNG, JPEG, WebP, or SVG
Image Format Converter
Convert images between PNG, JPG, WebP, BMP, and GIF formats instantly in your browser
Color Picker from Image
Upload any image and pick colors with a click. Extract dominant color palettes with HEX, RGB, and HSL values
Image Cropper
Crop images with drag-to-select, preset aspect ratios, and manual dimensions. Download as PNG or JPEG — all in your browser
Code to Image Converter
Convert code snippets to beautiful images with syntax highlighting, themes, and window chrome. Export as PNG — all in your browser
SVG to PNG/JPG Converter
Convert SVG files to PNG or JPG images online. Upload or paste SVG code, set custom dimensions, choose scale factor for retina exports, and download high-quality raster images. 100% client-side.
Encoding Tools
View all 10 →Base64 Encoder & Decoder
Base64 encode and decode online. Convert text, files, and images to Base64. Decode Base64 to image with live preview. URL-safe mode supported
Base64 Image Encoder & Decoder
Convert images to Base64 data URIs and decode Base64 strings back to images. Supports PNG, JPEG, GIF, WebP, and SVG. Copy as raw Base64, data URI, HTML img tag, or CSS background-image.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa with live clock
URL Encoder & Decoder
Free online URL encoder decoder. Encode and decode URLs instantly with encodeURIComponent, encodeURI, or query string mode. Auto-detect, parse URL components, and copy results. 100% browser-based.
URL Encode Decode Online
URL encode and decode online with bulk mode for multiple URLs. Component vs full URL encoding toggle, query string parser, and clipboard copy. Free browser-based tool.
Hash Generator
Generate MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512 hashes from text or files. HMAC-SHA256, hash comparison, drag-and-drop file hashing. All in-browser.
HTML Entity Encoder / Decoder
Encode special characters to HTML entities or decode entities back to plain text. Supports named (&), decimal (&), and hex (&) formats. Live preview as you type.
HTML Entity Encoder & Decoder
Free HTML entity encoder decoder online. Encode HTML special characters (&, <, >, ") to named, decimal, or hex entities. Decode HTML entities back to text instantly. Live preview, entity reference table, bulk mode. 100% browser-based.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal with BigInt precision and formatting
Markdown to HTML Converter
Convert Markdown to clean, semantic HTML with pretty formatting, preview mode, and full document export
Generator Tools
View all 7 →QR Code Generator
Generate QR codes for URLs, Wi-Fi, vCard contacts, email, phone, and SMS. Custom size, colors, error correction. Download PNG/SVG. Bulk mode up to 100
UUID Generator
Generate UUID v4 (random), v1 (timestamp), v7 (sortable) with bulk generation up to 1000, format options, download, and validation
Password Generator
Generate cryptographically secure random passwords and passphrases with customizable length, character sets, strength meter, and bulk generation
Password Strength Checker
Check how strong your password is with entropy calculation, crack time estimation, and improvement suggestions. 100% client-side — your password never leaves your browser
Lorem Ipsum Generator
Generate dummy placeholder text in paragraphs, sentences, or words. Classic lorem ipsum, hipster ipsum, bacon ipsum, and corporate ipsum variations with copy to clipboard
Barcode Generator
Generate Code 128, EAN-13, and UPC-A barcodes with custom size, colors, and PNG download
URL Slug Generator
Generate clean, SEO-friendly URL slugs from any text with separator, case, length, and stop word options
CSS Tools
View all 10 →Color Palette Generator
Generate beautiful color palettes with hex, RGB, and HSL values
CSS Gradient Generator
Free CSS gradient generator with visual editor. Create linear, radial, and conic gradients with draggable color stops, transparency, angle picker, 24 presets, Tailwind CSS output, cross-browser CSS code, and PNG download.
CSS Minifier & Beautifier
Minify CSS to reduce file size or beautify for readability with hex shortening and zero-unit removal
Color Picker
Free online color picker with visual selector. Convert between HEX, RGB, HSL, CMYK. Generate harmonious color palettes. Copy CSS color codes instantly.
Color Converter
Convert colors between HEX, RGB, HSL, HSV, and CMYK formats with visual picker and live preview
Tailwind CSS Converter
Convert CSS to Tailwind utility classes and Tailwind back to CSS with 80+ property support
CSS Box Shadow Generator
Create CSS box-shadow effects visually with multiple layers, blur, spread, color, and inset options
CSS Border Radius Generator
Generate CSS border-radius visually with individual corner controls, elliptical mode, presets, and live preview
CSS Glassmorphism Generator
Create frosted glass UI effects with backdrop-filter blur, transparency, border, and border radius controls
SVG Path Editor
Visual SVG path editor with live preview, draggable control points, command breakdown, shape presets, and transform controls. Edit SVG path d attributes interactively
Finance Tools
View all 13 →Compound Interest Calculator
Calculate compound interest with monthly, quarterly, or annual compounding. See how investments grow over time with optional monthly contributions
Salary to Hourly Calculator
Convert annual salary to hourly rate and hourly to salary. See breakdowns for daily, weekly, bi-weekly, monthly, and quarterly pay periods
ROI Calculator
Calculate return on investment percentage, net profit, and annualized ROI from your investment cost and returns
Markup & Margin Calculator
Calculate markup percentage, profit margin, and selling price from cost. Convert between markup and margin instantly
Tip Calculator
Calculate tips and split bills easily. Choose tip percentage, split between multiple people, and see per-person amounts
Free Invoice Generator
Create and download professional PDF invoices for free. Add line items, tax, payment terms, and company details — all in your browser
Profit Margin Calculator
Calculate gross and net profit margin, markup percentage, and cost ratio from revenue and costs. Compare margin scenarios instantly
Business Name Generator
Generate creative business name ideas for any industry. Get professional, modern, and unique name suggestions with one click
BAS Calculator
Calculate your quarterly Business Activity Statement GST amounts. Estimate GST on sales, purchases, and net payable or refund. Free Australian BAS calculator 2026
Sole Trader Tax Estimator
Estimate Australian sole trader income tax, Medicare levy, and take-home pay for 2025-26. Free sole trader tax calculator with ATO tax brackets
ABN Lookup
Validate Australian Business Numbers with the official ABN algorithm. Check ABN format, view validation breakdown, and extract ACN. Free ABN lookup tool 2026
Work From Home Deduction Calculator
Compare fixed rate (67c/hr) vs actual cost method for Australian work from home tax deductions 2025-26. Find which method gives you a bigger deduction
Crypto Tax Calculator AU
Calculate Australian capital gains tax on cryptocurrency trades. 12-month CGT discount, multiple trades, ATO 2025-26 tax brackets. Free crypto tax calculator
Health & Fitness
View all 5 →BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Check if you're underweight, normal, overweight, or obese with metric and imperial units
Calorie Calculator
Calculate your daily calorie needs using the Mifflin-St Jeor equation. Find your BMR, TDEE, and calories for weight loss or gain
Body Fat Percentage Calculator
Estimate your body fat percentage using the US Navy method. See fat mass, lean mass, and body fat category for men and women
Macro Calculator
Calculate your daily macros for protein, carbs, and fat. Choose from balanced, low carb, high protein, or keto splits based on your TDEE
Pregnancy Due Date Calculator
Calculate your pregnancy due date from last menstrual period, conception date, or IVF transfer. See trimester timeline and key milestones
AI Tools
View all 13 →AI Prompt Generator
Generate optimized prompts for ChatGPT, Claude, and Gemini. Choose style, tone, and model target to create effective AI prompts instantly
AI Email Writer
Generate professional email drafts instantly. Choose email type, tone, and length for follow-ups, introductions, requests, and more
AI Resume Bullet Points
Generate tailored resume bullet points from any job description. Optimized with action verbs, metrics, and keywords for your industry and seniority
AI Product Description Generator
Generate compelling e-commerce product descriptions. Feature-benefit, lifestyle, and SEO-optimized copy for any product category
AI Meeting Summary Generator
Transform raw meeting notes into structured summaries with action items, decisions, and next steps. Supports standups, planning, retros, and more
AI Paragraph Rewriter
Rewrite any paragraph in 6 styles: simplify, professional, creative, academic, concise, or expanded. Get two unique variations instantly
AI Blog Title Generator
Generate 10 catchy, SEO-friendly blog post titles for any topic. Choose from how-to, listicle, question, controversial, data-driven, and guide styles
AI LinkedIn Post Generator
Create engaging LinkedIn posts for thought leadership, career updates, industry news, and more. Choose tone, length, and format instantly
AI Color Palette Generator
Enter a mood or brand description and get 5 harmonious colors with hex, RGB, and Tailwind CSS classes. Free AI-powered color palette generator
AI Meta Description Generator
Generate 3 SEO-optimized meta descriptions for any page. AI-powered meta description generator with character count and keyword optimization
AI Regex Generator
Describe what you want to match in plain English and get the regex pattern with explanation. Free AI-powered regex generator with live testing
AI Commit Message Generator
Paste a git diff and get a conventional commit message instantly. AI-powered commit message generator following conventional commits standard
AI Privacy Policy Generator
Generate a basic privacy policy for your website or app. Enter your business details and get a professional privacy policy instantly. Free AI-powered generator
Construction & Trades
View all 5 →Concrete Calculator
Calculate concrete volume in cubic metres for slabs, footings, columns and stairs. Includes wastage allowance and pre-mix bag estimates. Free online concrete calculator
Brick Calculator
Calculate bricks per square metre with mortar joints and wastage allowance. Supports standard Australian brick sizes and bond patterns. Free online brick calculator
Roof Pitch Calculator
Calculate roof pitch in degrees, rise and run, rafter length and roof area multiplier. Convert between angle, ratio and percentage. Free online roof pitch calculator
Electrical Cable Size Calculator
Calculate minimum cable size for voltage drop compliance per AS/NZS 3008. Single and three phase, copper and aluminium. Free online cable size calculator
Paint Coverage Calculator
Calculate how much paint you need in litres for walls and ceilings. Room mode with door and window deductions, multiple coat types. Free online paint calculator