• ASCII Art Generator Convert any text to ASCII art instantly. Choose from 10 figlet-compatible fonts (Standard, Big, Banner, Block, Bubble, Digital, Doom, Graffiti, Shadow, Slant), adjust width, copy to clipboard or export as PNG. 100% free, works in your browser.
• Aspect Ratio Calculator Calculate aspect ratios from width and height instantly. Scale dimensions while preserving the ratio, use common presets (16:9, 4:3, 1:1, 21:9), and check if your size matches HD, FHD, or 4K. Free, works entirely in your browser.
• Base64 Encoder & Decoder Encode text to Base64 or decode Base64 strings instantly. Supports UTF-8, Unicode, emojis and URL-safe Base64. Free, fast, works entirely in your browser — no data uploaded.
• BMI Calculator Calculate your Body Mass Index (BMI) with metric or imperial inputs. Get WHO category, ideal weight range for your height, and Harris-Benedict BMR estimate. Free, 100% client-side.
• Character Counter Count characters, words, sentences and lines in real time. See instantly if your text fits Twitter/X, Instagram, LinkedIn, SMS, Google Ads and more. Free, no signup, runs in your browser.
• chmod Calculator Calculate Unix file permissions visually. Click checkboxes to set read/write/execute for owner, group, and others. Get the octal code, symbolic notation, and chmod command instantly. 100% client-side.
• Color Contrast Checker Check the contrast ratio between two colors against WCAG 2.1 accessibility standards. Instantly see if your foreground/background combination passes AA or AAA for normal and large text. 100% client-side.
• Color Format Converter Convert colors between HEX, RGB, HSL, and CSS named colors instantly. Auto-detects the input format, shows a live preview, and lets you copy each value with one click. Free, works entirely in your browser.
• Color Palette Generator Generate harmonious color palettes from any base color. Choose from Monochromatic, Complementary, Triadic, Analogous, and Split-Complementary schemes. Get HEX, RGB, HSL values, WCAG contrast checks, and CSS export. Free, runs in your browser.
• Countdown Timer Free online countdown timer to any date and time. Add multiple countdowns, set any timezone, share via URL, and get browser notifications when your event arrives. 100% client-side — no account needed.
• Cron Expression Builder Build cron expressions visually with field-by-field controls. Set Every, Specific, Range, or Step mode for each field, preview the next 5 execution times, validate syntax in real time, and copy the final cron command. Free, 100% client-side.
• Cron Expression Explainer Paste any cron expression and instantly see it explained in plain English and German. Shows the next 5 execution times, highlights syntax errors, and includes a preset library for common schedules. Free, runs entirely in your browser.
• CSS Border Radius Generator Visual CSS border-radius generator with 4-corner sliders, px/% toggle, presets (Circle, Pill, Card, Squircle), live preview box, and one-click copy. Free, 100% client-side.
• CSS Box Shadow Generator Generate CSS box-shadow code interactively. Adjust offset, blur, spread, color and opacity with live preview. Stack multiple shadows, toggle inset, add vendor prefixes, and copy ready-to-use CSS instantly. Includes 8 popular presets. Free, 100% client-side.
• CSS Clip-path Generator Create CSS clip-path shapes visually. Drag handles to edit polygon points, choose from circle, ellipse or inset shapes, apply preset shapes like triangle, star or hexagon, and copy the ready-to-use clip-path CSS. Free, 100% client-side.
• CSS Flexbox Generator Build CSS Flexbox layouts visually. Control flex-direction, wrap, justify-content, align-items, gap, and per-item properties. Live preview with dummy boxes, 5 preset layouts, and instant CSS copy. Free, 100% client-side.
• CSS Gradient Generator Create CSS gradients interactively. Choose linear, radial, or conic type, add unlimited color stops, adjust angles, and copy the ready-to-use CSS code. Includes vendor prefixes and 10 preset gradients. Free, works entirely in your browser.
• CSS Grid Generator Build CSS Grid layouts visually. Define columns and rows with fr, px, auto and minmax(). Set gaps, span items across cells, use named grid areas, and apply preset layouts. Live preview with instant CSS export. Free, 100% client-side.
• CSS Minifier Minify or format CSS instantly in your browser. Shows byte savings and detects vendor prefixes. No data uploaded — runs 100% locally.
• CSS Text Shadow Generator Create stunning CSS text shadows with live preview. Stack multiple shadows, choose from 8 presets (neon, retro, emboss, fire), adjust offset, blur, and color. Copy the generated CSS with one click. Free, 100% client-side.
• CSS Text Shadow Generator Generate CSS text-shadow code visually. Adjust X/Y offset, blur, color and opacity with live preview. Stack multiple shadows for glow, neon, 3D and retro effects. Includes 8 popular presets. Copy ready-to-use CSS instantly. Free, 100% client-side.
• CSV to JSON Converter Convert CSV files or pasted data to JSON instantly. Supports comma, semicolon, tab and pipe delimiters. Outputs array of objects or array of arrays. Download the result as a .json file. Free, browser-based, no data uploaded.
• Date Calculator Calculate the exact difference between two dates in years, months, and days. Add or subtract days (including business days only). Calculate your age. Find the next weekday. Free, instant, 100% client-side.
• Diff Checker Compare two texts and see exactly what changed. Line-by-line diff with word-level highlighting, added/removed stats, and options to ignore whitespace or case. Runs 100% in your browser — no data uploaded.
• File Size Converter Convert file sizes between all byte units instantly: Bytes, KB, MB, GB, TB, PB (decimal SI) and KiB, MiB, GiB, TiB, PiB (binary IEC). Includes download time calculator and SI vs IEC explainer. Free, 100% client-side.
• Hash Generator Generate cryptographic hashes (SHA-256, SHA-512, SHA-1, MD5) from text or files instantly in your browser. Compare hashes, toggle case, and verify file integrity — 100% client-side, no data sent to any server.
• HTML Color Picker Pick any color with the native browser color picker and instantly see HEX, RGB, HSL, and CSS name. Saves your last 12 colors as swatches for quick access. Free, works entirely in your browser.
• HTML Entity Encoder & Decoder Encode and decode HTML entities instantly in your browser. Supports named entities (&, <, >, ©, € and more) and numeric entities (<, <). Free, fast, 100% client-side — no data uploaded.
• HTML Formatter Format, beautify or minify HTML instantly in your browser. Choose 2-space, 4-space or tab indent. Shows byte savings. No data uploaded — runs 100% locally.
• HTML Meta Tag Generator Generate complete HTML head meta tags instantly. Covers SEO basics, Open Graph (Facebook), Twitter Card, robots directives, viewport, and charset. Live preview shows how your page looks in Google, Facebook, and Twitter. Copy the full <head> block in one click. 100% free, client-side.
• HTTP Status Codes Complete HTTP status code reference — all 1xx, 2xx, 3xx, 4xx, 5xx codes plus Cloudflare and nginx non-standard codes. Search by code number or description, filter by category, copy code+name in one click. Free, client-side, no data uploaded.
• Image to Base64 Converter Convert any image (PNG, JPG, GIF, WebP, SVG) to Base64 or a Data-URL instantly. 100% client-side — no upload, no server. Decode Data-URLs back to images. Copy HTML img-tag and CSS snippets.
• JavaScript Formatter & Minifier Format or minify JavaScript instantly in your browser. Configurable indentation, comment stripping, syntax checking, and byte savings. No data uploaded — runs 100% client-side.
• JSON Formatter Format, validate and minify JSON instantly. Shows syntax errors with line numbers. Copy to clipboard. Works entirely in your browser — no data uploaded.
• JSON to CSV Converter Convert JSON arrays to CSV instantly. Choose delimiter, toggle headers, flatten nested objects with dot-notation. Also converts CSV back to JSON. Free, browser-based, no data uploaded.
• JWT Decoder Decode JSON Web Tokens (JWT) instantly. View header, payload, and signature. Check expiry, inspect claims, and detect sensitive data. 100% client-side — your token never leaves your browser.
• Keyboard Key Code Finder Press any key to instantly see all JavaScript keyboard event properties: event.key, event.code, keyCode, which, charCode, and active modifiers. History of last 10 keys, copy any value. Free, 100% client-side.
• Loan & Mortgage Calculator Calculate your monthly loan or mortgage payment using the PMT formula. Get total interest, a full amortization schedule by year, compare two scenarios side-by-side, and see how extra payments save time and money. Free, 100% client-side.
• Lorem Ipsum Generator Generate Lorem Ipsum placeholder text by paragraphs, words, or sentences. Choose plain text, HTML or Markdown output, classic or randomized — 100% client-side, no data uploaded.
• Markdown Editor Write Markdown and see a live HTML preview instantly. Copy HTML output, download your .md file, and get word/character counts. 100% client-side — no data uploaded.
• Morse Code Converter Free online Morse code converter. Translate text to Morse code or decode Morse back to text instantly. Includes audio playback, adjustable WPM speed, and full ITU character reference. 100% client-side.
• Number Base Converter Convert numbers between binary, octal, decimal, and hexadecimal instantly. Supports negative numbers, two's complement (8/16/32-bit), and any custom base from 2 to 36. Free, works entirely in your browser.
• Number to Words Converter Convert any number (0–999 billion) to English words instantly. Supports cardinal form, ordinal form (first, second, third…), and currency mode (dollars and cents). Handles negative numbers, decimals for currency, and copy-to-clipboard. 100% client-side — no data sent to any server.
• Open Graph Preview Preview how your page looks when shared on Twitter/X, LinkedIn, Facebook, and Discord. Enter a URL or paste HTML to instantly check og:title, og:description, and og:image previews. Free, no login required.
• Password Generator Generate cryptographically secure passwords (8–128 chars) or diceware-style passphrases instantly. Choose character sets, check entropy strength, copy with one click. 100% in-browser — no data sent to any server.
• Percentage Calculator Calculate percentages instantly in your browser: find what percent of a number is, calculate percentage change, apply discounts or markups, and use the tip calculator. Free, no ads, works offline.
• Pomodoro Timer Free online Pomodoro timer with 25/5/15 min intervals, animated countdown ring, browser notifications, and optional tick sound. Fully configurable, works offline in your browser — no signup.
• Px to REM Converter Convert px to rem and em instantly with a configurable base font size. Includes batch conversion, rem-to-px reverse, em-to-px, Tailwind spacing reference, breakpoint presets, and CSS snippet copy. 100% client-side.
• QR Code Generator Generate QR codes instantly in your browser. Supports URLs, plain text, vCard contacts, WiFi credentials, and email links. Customize size, error correction, and colors. Download as PNG or SVG — 100% free, no signup.
• Random Number Generator Generate random numbers instantly: integers, decimals, unique sets (1–1000), RPG dice (d6/d10/d20/d100), coin flips, and random picks from a custom list. Seeded reproducibility included. Free, 100% client-side.
• Readability Analyzer Analyze text readability with Flesch Reading Ease and Flesch-Kincaid Grade Level scores. See sentence and syllable counts, average words per sentence, and a plain-language reading level label. Free, 100% client-side.
• Reading Time Calculator Calculate how long it takes to read any text. Set reading speed for normal, technical, or code content. Free, instant, browser-based — no data uploaded.
• Regex Tester Test and debug regular expressions interactively. Supports global, case-insensitive, multiline, and dotAll flags. Shows all matches, capture groups, and highlights results in real time. Free, works in your browser.
• robots.txt Generator Generate a valid robots.txt file visually. Add User-agent blocks for Googlebot, Bingbot, or all bots, set Disallow and Allow paths, add a Sitemap URL, and configure Crawl-delay. Live preview updates instantly. Copy or download your robots.txt in one click. 100% free, client-side.
• Roman Numeral Converter Convert decimal numbers to Roman numerals and back — free, instant, 100% client-side. Supports 1–3999, all subtraction pairs (IV, IX, XL, XC, CD, CM), validation of invalid inputs, batch mode, and a built-in reference table. No data is sent to any server.
• Slugify — URL Slug Generator Convert any text to a clean URL slug instantly. Handles German umlauts (ä→ae, ö→oe, ü→ue, ß→ss), accented characters, and special chars. Supports batch mode, custom separator, and max length. 100% client-side — no data uploaded.
• Speed Converter Convert speeds instantly between km/h, mph, m/s, knots (kn), Mach (Ma), and the speed of light (c). Live bidirectional conversion, real-world speed references (walking, cars, sound, light), travel time calculator, precision control 0–6 decimals, and copy-to-clipboard. Free, 100% client-side.
• SQL Formatter Format, indent and beautify SQL queries online. Supports SELECT, JOIN, WHERE, GROUP BY, keyword case conversion and minify mode. 100% client-side — no data uploaded.
• String Escaper & Unescaper Escape and unescape strings for HTML, JavaScript, JSON, Python, SQL, RegExp, and CSV — free, instant, runs entirely in your browser. Supports auto-detection and roundtrip verification.
• Temperature Converter Convert temperatures instantly between Celsius, Fahrenheit, Kelvin, and Rankine. Live bidirectional conversion, reference points (freezing, boiling, body temp, absolute zero), formula display, precision control 0–5 decimals, and copy-to-clipboard. Free, 100% client-side.
• Text Case Converter Convert text between camelCase, PascalCase, snake_case, SCREAMING_SNAKE_CASE, kebab-case, Title Case, Sentence case, and Alternating Case instantly. Live preview, one-click copy. Free, works entirely in your browser.
• Time Zone Converter Convert times between any two time zones — DST-aware, 100% client-side. Supports UTC, Berlin, London, New York, Los Angeles, Tokyo, Sydney and all IANA time zones. Free world clock and meeting planner.
• Tip Calculator Calculate tips instantly: enter bill amount, choose a tip percentage (10–25%), split between any number of people, and optionally round up. Supports unequal splits. Free, 100% client-side.
• Typing Speed Test Test your typing speed and accuracy online. Measures WPM (words per minute), accuracy percentage, and error count. Choose 15s–120s duration and Easy / Normal / Code difficulty. Free, 100% client-side.
• Unix Timestamp Converter Convert Unix timestamps to human-readable dates and vice versa. Auto-detects seconds vs milliseconds. Shows relative time and timezone-aware output. Free, instant, works entirely in your browser.
• URL Encoder & Decoder Encode and decode URLs instantly with percent-encoding (encodeURIComponent). Also supports Base64 encode/decode. Free, fast, works entirely in your browser — no data uploaded.
• URL Parser & Debugger Parse any URL into its components — protocol, host, port, path, query parameters, and fragment. Edit query params, encode/decode values, resolve relative URLs, and detect UTM, OAuth, and API patterns. Free, instant, 100% client-side.
• UUID Generator Generate UUID v4 instantly — bulk up to 50 at once, with or without hyphens, uppercase. Validate any UUID. Runs entirely in your browser — nothing is uploaded.
• Word Counter Count words, characters, sentences, paragraphs and reading time instantly. Free, fast, no signup. Works entirely in your browser.
• Word Frequency Analyzer Analyze word frequency in any text. See word counts, percentages, filter stop words (English/German), and export results as CSV. Sortable table with Top 10/20/50/All filter. Free, 100% client-side.
• XML Formatter Format, validate and minify XML instantly in your browser. Prettify XML with configurable indentation, check for tag-balance errors, or compress XML to a single line. No data uploaded, 100% client-side.
• YAML ↔ JSON Converter Convert YAML to JSON or JSON to YAML instantly. Auto-detects input format. Supports YAML anchors & aliases, syntax validation, copy-to-clipboard, and file download. Free, browser-based, no data uploaded.