Free Online Tools

Format, beautify, validate and minify JSON data with syntax highlighting.

Generate TypeScript interfaces from JSON data automatically.

Explore JSON as an interactive tree. Click any value to get its path.

Generate JSON Schema from JSON data. Validate JSON against schemas.

Convert JSON arrays to CSV and CSV to JSON. Custom delimiters.

Compare two JSON objects. See added, removed and changed values.

Encode text to Base64 or decode Base64 to text. Supports UTF-8.

Generate random UUID v4 identifiers. Bulk generate and validate UUIDs.

Test regex patterns with real-time highlighting and capture groups.

Complete regex reference with search, examples and quick tester.

Convert Unix timestamps to dates and vice versa. Live epoch time.

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes.

Convert between HEX, RGB, HSL and HSV with live preview and shades.

Pick colors visually. Get HEX, RGB, HSL values. RGB sliders.

Generate color schemes: complementary, triadic, analogous and more.

Encode or decode URLs and query strings with percent-encoding.

Decode and inspect JSON Web Tokens. View header, payload and claims.

Encode special characters to HTML entities or decode them back.

Build cron expressions visually. See next run times and descriptions.

Convert between binary, octal, decimal and hex with bit visualization.

Convert text to binary, octal, decimal and hex representations.

Binary arithmetic and bitwise operations. AND, OR, XOR, NOT, shifts.

Calculate Unix file permissions. Convert between symbolic and numeric.

Write Markdown with real-time HTML preview. Full syntax support.

Create Markdown tables visually. Set alignment, import from CSV.

Minify CSS for production or beautify compressed CSS for readability.

Minify JavaScript to reduce file size or beautify compressed JS.

Format, beautify and indent SQL queries. Uppercase keywords.

Convert CSV to JSON and back. Custom delimiters and table preview.

Convert YAML to JSON and JSON to YAML. Validate YAML syntax.

Convert HTML to Markdown and Markdown to HTML. Clean output.

Create linear, radial and conic CSS gradients visually with presets.

Create CSS box shadows visually. Presets from Material and Tailwind.

Create CSS border-radius shapes visually. Control each corner.

Create CSS Flexbox layouts visually. All flex properties.

Create CSS Grid layouts visually. Columns, rows, gap, presets.

Create CSS animations visually. 12 presets, custom timing.

Create CSS text shadows with multiple layers and presets.

Create CSS clip-path shapes visually. 16 shape presets.

Convert Tailwind classes to CSS and CSS to Tailwind classes.

Create HTML tables visually. Edit cells, choose styles, copy HTML.

Searchable reference of all HTTP status codes with descriptions.

Generate Apache .htaccess: redirects, GZIP, caching, security.

Find beautiful font pairings. Preview heading + body combinations.

Generate placeholder images with custom size, color and text.

Generate random photo placeholders from Lorem Picsum.

Create favicons from text or emoji. Download in multiple sizes.

Generate fake test data: names, emails, addresses. Export JSON/CSV.

Combine multiple PDF files into one. Drag to reorder. Free online PDF merger.

Split PDF into separate pages or extract page ranges. Free PDF splitter.

Compress PDF files to reduce size. Three compression levels.

Convert PDF pages to JPG or PNG. Choose scale 1x-3x.

Convert images to PDF. Combine multiple images into one document.

Reorder, rearrange and delete pages in a PDF. Drag and drop.

Count words, characters, sentences and paragraphs. Reading time estimate.

Check character limits for Twitter/X, Instagram, LinkedIn and more.

Analyze word frequency, bigrams and trigrams. Stop word filter.

Generate placeholder text in paragraphs, sentences or words.

Convert between UPPERCASE, lowercase, camelCase, snake_case and 8 more.

Compare two texts and highlight additions, deletions and changes.

Search and copy emojis by name or category. Hundreds of emojis.

Convert text to speech with adjustable speed, pitch and voice.

Repeat any text multiple times with custom separator.

Sort lines A-Z, Z-A, by length, numeric, random. Remove duplicates.

Remove or find duplicate lines in text. Case-sensitive options.

Reverse strings, words, sentences. Palindrome checker.

Convert plain text to HTML. Auto-link URLs and emails.

Summarize long text into key points. Extractive summarization.

Check text for grammar, spelling and style mistakes. Auto-correct.

Convert numbers to words, currency format and ordinals.

Convert text to Morse code and back. Audio playback included.

Generate secure random passwords with custom length and complexity.

Create QR codes for URLs, text, WiFi, email. Download as PNG.

Convert images to Base64 data URLs. Drag & drop, copy as HTML/CSS.

Resize images online. Lock aspect ratio, choose format and quality.

Compress images to reduce file size. Adjustable quality slider.

Convert between PNG, JPG, WebP, BMP. Batch conversion support.

Crop images with preset aspect ratios or custom selection.

Rotate images 90°, 180°, 270°. Flip horizontal or vertical.

Add text watermarks to images. Custom position, opacity, tiling.

Convert images to ASCII text art. Adjustable width and charset.

Convert SVG to PNG with custom scale and background color.

Simulate how colors appear with different types of color vision.

Random numbers, dice rolls, coin flips. Cryptographically secure.

Pick from a list, flip coins, roll dice, yes/no, random colors.

Generate random names for characters, fiction or testing.

Calculate X% of Y, percentage change, tip calculator and more.

Trigonometry, logarithms, powers, roots. Full scientific keypad.

Add, subtract, multiply, divide fractions. Simplify and convert.

Convert length, weight, temperature, volume, speed, area, data, time.

Convert between Celsius, Fahrenheit and Kelvin with formulas.

Convert kitchen units: cups, tablespoons, teaspoons, ml, oz, grams.

Convert between Roman numerals and Arabic numbers. Both directions.

Calculate aspect ratios, resize proportionally. Common presets.

Check screen size, viewport, DPI, pixel ratio and breakpoints.

Generate Code 128 and Code 39 barcodes. Download as PNG.

25-minute work sessions with breaks. Track productivity sessions.

Millisecond-precision stopwatch with lap times. Fastest/slowest.

Set countdowns to any date. Days, hours, minutes, seconds display.

See current time in multiple cities. Add favorites, live updating.

Convert between time zones. Calculate date differences.

Find your public IP and geolocation. Look up any IP address.

Validate email format. Detect typos, identify providers. Bulk mode.

Encrypt and decrypt text with AES-256. Password-based, client-side.

Calculate exact age in years, months, days. Next birthday countdown.

Calculate Body Mass Index. Metric and imperial. Healthy weight range.

Calculate your GPA on a 4.0 scale. Add courses dynamically.

Test your WPM, CPM and accuracy. Real-time typing statistics.

Generate unique usernames: cool, gaming, professional, funny styles.

Create study flashcards. Flip to study, import/export CSV decks.

Simple notepad with auto-save. Word count, download as TXT.

Draw with mouse or touch. Colors, brush size. Download as PNG.

White, pink and brown noise for focus, sleep and relaxation.

Guided breathing: Box, 4-7-8, Deep Calm. Animated visual guide.

Calculate monthly payments, total interest. Amortization table.

Home price, down payment, rates. Monthly breakdown, extra payments.

Calculate compound interest growth. Year-by-year breakdown.

Calculate tips, split bills. Preset percentages, round-up option.

Calculate sales tax. US state presets. Reverse and bulk modes.

Calculate trip fuel cost. MPG or km/L, distance, fuel price.

Calculate appliance electricity cost. Daily, monthly, yearly.

Generate SEO meta tags, Open Graph and Twitter Card markup.

Preview social media cards for Facebook, Twitter/X and LinkedIn.

Preview Twitter/X cards. Generate twitter:card meta tags.

Generate JSON-LD structured data for 8 schema types.

Convert titles into clean, SEO-friendly URL slugs. Bulk mode.

Analyze keyword frequency and density in your content for SEO.

Analyze heading hierarchy. Flag missing H1, skipped levels. SEO score.

Create robots.txt files to control search engine crawling.

Generate XML sitemaps with priority and change frequency.

Generate redirect rules for Apache, Nginx, Cloudflare, Vercel.

Build UTM campaign URLs for Google Analytics tracking.

Score headlines for SEO. Power words, emotional words, length.

Flesch, Gunning Fog, Coleman-Liau readability scores for your text.

Generate hashtags for Instagram, Twitter/X, TikTok and LinkedIn.

Format text with bold, italic, unicode fonts for social media.

Check password strength, entropy and estimated crack time.

Generate strong, memorable passphrases from random words.

Identify hash types: MD5, SHA-1, SHA-256, bcrypt and more.

Generate and verify bcrypt password hashes. Adjustable rounds.

Calculate CIDR subnets, IP ranges, hosts count, wildcard masks.

Generate random MAC addresses. Multiple formats and bulk mode.

Build Content Security Policy headers. HTTP and meta tag output.

Generate CORS headers with Express and Nginx configuration output.

Analyze and score website security headers. Get recommendations.

Create professional invoices with line items, tax and discounts. Print as PDF.

Generate privacy policies covering GDPR, CCPA, cookies and analytics.

Calculate discounts, savings, final price. Stack multiple discounts.

Calculate return on investment, annualized ROI and net profit.

Calculate markup %, profit margin, cost and selling price.