Full Website Sitemap & Tool Index

Measure real-world objects on your screen at true mm/cm/inch scale — stays accurate even when you zoom.

Get matching dimensions for any ratio (1:1, 4:5, 9:16...) or calculate a center-crop for your image.

Find the max print size your image supports, or how many pixels you need for a target size and quality.

Resize and compress an image right in your browser, preview the result, and download it — nothing is uploaded.

Pick any color and get HEX, RGB, HSL, HSV values instantly. Generate complementary, analogous, and triadic palettes with CSS/Tailwind/JSON export.

See how strong a password is and how long it would take to crack — checked 100% in your browser.

Find your daily calorie needs (TDEE) and a suggested macro split, then log what you eat against it.

Estimate your due date, current week of pregnancy, or your next ovulation and fertile window.

Test regular expressions live with match highlighting, capture groups, and a quick-reference cheatsheet.

Build, validate, and parse cron expressions with human-readable explanations and execution previews.

Convert between the three formats instantly — nothing is uploaded, it all runs in your browser.

Create customizable QR codes for links, Wi-Fi, vCard contacts, email & text with high-res PNG & SVG downloads.

Convert images to PDF, merge multiple PDFs into one, or split a PDF into individual pages — 100% in your browser, zero upload.

Convert between 80+ units across length, weight, temperature, area, volume, speed, time, data storage, energy, and pressure — instantly in your browser.

Combine multiple PDF files into one single document in seconds. 100% browser-based with pdf-lib, zero file upload, complete privacy.

Split PDF documents and extract specific pages or page ranges into separate files. 100% client-side privacy, zero file uploads.

Convert JPG, PNG, and WebP images to high-quality PDF documents. Reorder images, adjust orientation, 100% private in-browser.

Convert JPG / JPEG photos to PDF documents instantly. 100% browser-based conversion with zero quality loss and zero uploads.

Convert transparent and high-res PNG images into PDF files. Preserves visual sharpness with 100% in-browser processing.

Convert JSON data or nested objects into clean CSV spreadsheets instantly. 100% browser-based with PapaParse, zero upload.

Convert CSV spreadsheets and table data into clean formatted JSON arrays. 100% in-browser, auto type detection, zero upload.

Convert JSON configurations into clean, human-readable YAML. Perfect for Kubernetes, Docker Compose, GitHub Actions, and Ansible.

Convert YAML configuration files into valid JSON format instantly. 100% in-browser with syntax validation.

Convert CSV table rows directly into structured YAML document lists. 100% client-side.

Convert YAML lists and documents into CSV format for spreadsheet analysis. Zero upload.

Encode plain text strings, authorization tokens, and data into Base64 format instantly. 100% private in-browser.

Decode Base64 strings back into readable plain text. Fast, secure, and 100% client-side in your browser.

Decode and inspect JWT (JSON Web Token) header, payload claims, and expiration timestamps. 100% client-side, zero network calls.

Convert hexadecimal (hex) byte strings into readable ASCII and UTF-8 text. 100% client-side.

Convert plain text strings into hexadecimal (hex) byte representation instantly. 100% in-browser.

Convert binary code (8-bit bytes of 1s and 0s) into readable text and letters. 100% free online.

Convert plain text strings and letters into 8-bit binary code (0s and 1s) instantly.

Resize any photo to official passport size (2×2 inches, 51×51mm, 600×600px at 300 DPI). 100% browser-based, zero upload, instant download.

Resize images to exact Instagram dimensions: 1080×1080 square post, 1080×1350 portrait, 1080×1920 story/reel. 100% browser-based.

Resize images to the exact YouTube thumbnail size (1280×720 pixels, 16:9 ratio). 100% browser-based with quality control.

Resize images to exact LinkedIn dimensions: 400×400 profile photo, 1584×396 banner, 1200×627 post. 100% browser-based.

Resize images to exact Twitter/X dimensions: 400×400 profile, 1500×500 header, 1200×675 post image. 100% browser-based.

Resize images to exact Facebook dimensions: 170×170 profile, 820×312 cover, 1200×630 post. 100% browser-based.

Compress any image to under 100KB for email attachments, website uploads, and form submissions. 100% browser-based, zero upload.

Resize any photo to 2×2 inches (600×600 pixels at 300 DPI). Perfect for passport photos, ID cards, and visa applications.

Generate strong, uncrackable random passwords with uppercase, lowercase, numbers, and symbols. 100% in-browser cryptographic security.

Generate military-grade 24+ character passwords designed to withstand brute-force attacks and quantum dictionary cracking.

Generate secure random numeric PIN codes for ATM cards, door locks, voicemail, SIM cards, and phone passcodes.

Generate easy-to-remember, highly secure multi-word passphrases (e.g. correct-horse-battery-staple). 100% private in-browser.

Test how secure your password is and see estimated time to crack against GPU clusters and offline dictionary attacks. 100% private.

Test and copy standard email validation regular expressions for JavaScript, Python, PHP, and Java. Matches standard RFC email formats.

Validate US and international telephone numbers with regex. Supports parentheses, dashes, dots, spaces, and country codes.

Validate HTTP and HTTPS website URLs with regular expressions. Matches domain names, ports, query strings, and paths.

Validate IPv4 IP addresses (0.0.0.0 to 255.255.255.255) with range-checked regular expressions.

Enforce strong password rules with lookahead regular expressions: min 8 characters, uppercase, lowercase, number, and special symbol.

Validate ISO 8601 date strings (YYYY-MM-DD) with month and day boundary enforcement.

Validate 36-character UUID Version 4 strings with standard hyphen formatting.

Validate 3-digit and 6-digit CSS hexadecimal color codes with regex.

How to run a cron job every 5 minutes (*/5 * * * *). Crontab syntax explanation, execution timetable, and validator.

Schedule a cron task every 15 minutes with */15 * * * *. Schedule breakdown and next execution dates.

How to run a cron job once every hour at the top of the hour (0 * * * *). Syntax and execution timetable.

Run a daily cron job at midnight (00:00) with 0 0 * * *. Daily maintenance, log rotation, and backup schedule.

Schedule a cron job to run at 12:00 PM noon every day using 0 12 * * *.

Run a weekly cron job every Monday at midnight with 0 0 * * 1. Weekly digest and summary schedule.

Schedule cron tasks for business days (Monday through Friday) at 9:00 AM using 0 9 * * 1-5.

Run a monthly recurring task on the 1st of every month at midnight with 0 0 1 * *.

Calculate max high-quality print dimensions at 300 DPI (dots per inch). Convert pixel dimensions to physical print inches and centimeters.

Calculate large-format print sizes at 150 DPI for posters, trade show banners, and canvas art.

Find the exact pixel dimensions needed for a 4×6 inch photo print at 300 DPI (1200×1800 px). Free online calculator.

Calculate pixel dimensions for a 5×7 inch photo print at 300 DPI (1500×2100 pixels).

Calculate pixel dimensions for an 8×10 inch photo print at 300 DPI (2400×3000 pixels).

Find exact A4 paper dimensions in pixels at 300 DPI (2480×3508 px), 150 DPI, and 72 DPI. International standard sheet size.

Calculate pixel resolution needed for standard 24×36 inch full-size architectural and movie posters.

Accurate online centimeter ruler calibrated to your screen size. Measure real physical objects in cm and mm on your phone, tablet, or monitor.

Accurate online inch ruler displayed at true 1:1 physical scale on any display. Includes 1/16th inch precision markings.

High-precision millimeter ruler on screen with sub-millimeter tick marks for fine measurement and engineering checks.

Calibrate any screen ruler to 100% accurate physical dimensions using a standard credit card (ISO/IEC 7810 ID-1 standard).

Convert HEX color codes (#RRGGBB) to RGB (Red, Green, Blue) values with alpha transparency and CSS code snippet export.

Convert RGB (Red, Green, Blue) integer values to standard 6-digit HEX color codes (#RRGGBB).

Convert HEX color codes to HSL (Hue, Saturation, Lightness) format with degree angles and percentage sliders.

Generate beautiful harmonious color palettes: complementary, analogous, triadic, split-complementary, and monochromatic.

Find the exact opposite (complementary) color on the 360° color wheel for high-contrast, visually striking UI accents.

Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation. Learn how many calories your body burns strictly at rest.

Calculate your TDEE (Total Daily Energy Expenditure) based on your activity level. Learn your maintenance calories for weight loss, maintenance, or muscle gain.

Calculate your target macronutrient ratio (protein, carbohydrates, and fats in grams) customized for weight loss, bodybuilding, keto, or balanced health.

Calculate your daily protein requirements based on body weight, fitness goals, and training intensity (1.6g to 2.2g per kg for muscle building).

Calculate your daily calorie deficit target for sustainable, safe fat loss (300-500 kcal deficit per day) while preserving muscle mass.

Estimate your body fat percentage, fat mass, and lean mass using the U.S. Navy circumference method with neck, waist, and hip tape measurements.

Calculate your clinical Ideal Body Weight (IBW) based on height, sex, and age using recognized medical formulas.

Calculate how many ounces or liters of water you should drink daily based on body weight, climate, and exercise activity.

Calculate your eating and fasting time windows for popular intermittent fasting protocols: 16:8, 18:6, 20:4 (Warrior Diet), and OMAD.

Calculate your estimated due date (EDD) using Naegele’s Rule, LMP date, conception date, or IVF transfer. ACOG guidelines & trimester breakdown.

Calculate your upcoming ovulation date and 6-day fertile window based on cycle length. Maximize conception chances with medical timing guidance.

Calculate your likely conception date based on your estimated due date (EDD) or last menstrual period (LMP). Medical timing breakdown.

Find your exact current week and day of pregnancy, trimester status, remaining days, and fetal development milestone benchmarks.

Calculate healthy target pregnancy weight gain ranges based on pre-pregnancy BMI according to Institute of Medicine (IOM) clinical guidelines.

Calculate exact calendar transition dates for your 1st, 2nd, and 3rd pregnancy trimesters based on your last period or estimated due date.

Calculate your estimated embryo implantation dates (6 to 12 days post-ovulation) and when to take a reliable home pregnancy test.

Calculate your exact estimated delivery date for IVF pregnancies based on Egg Retrieval date or 3-Day / 5-Day frozen embryo transfer (FET).

Calculate 9:16 aspect ratio dimensions for TikTok, Instagram Reels, YouTube Shorts, and Stories. Resolution chart, formula, and crop guide.

Calculate 16:9 widescreen aspect ratio dimensions (1920x1080, 4K 3840x2160). Resolution table, formula, and crop calculator.

Calculate 4:5 vertical portrait post dimensions for Instagram feed (1080x1350). Resolution table, formula, and crop calculator.

Calculate 1:1 square aspect ratio dimensions (1080x1080, 500x500). Perfect for Instagram square posts, avatars, and product photos.

Calculate 3:2 aspect ratio dimensions for 35mm film, DSLR camera sensors, and 4x6 / 6x9 photo prints.

Calculate 21:9 ultrawide monitor resolutions (3440x1440, 2560x1080, 5120x2160) and cinematic video dimensions.

Calculate 4:3 aspect ratio resolutions (1024x768, 2048x1536). Ideal for iPad screens, retro CRT displays, and traditional photography.

Calculate 2:3 vertical aspect ratio dimensions (1000x1500). Ideal for Pinterest graphic pins, vertical poster prints, and portrait photos.

Generate high-resolution QR codes for website links and URLs. Customizable colors, logo branding, zero sign-up, PNG & SVG downloads.

Generate Wi-Fi QR codes so guests and customers can join your Wi-Fi network instantly without typing passwords. Supports WPA/WPA2/WPA3 & hidden SSIDs.

Create vCard QR codes to instantly save contact details (name, phone, email, company, title) to smartphone address books.

Generate email QR codes pre-filled with recipient address, subject line, and body text. Tap to open default mail client.

Generate QR codes for plain text notes, instructions, serial codes, and messages. Fast, private, and customizable.

Create QR codes that automatically open phone SMS messages with pre-filled phone numbers and draft text. 100% private.

Master directory of all client-side browser tools and suites

Run multiple tools side-by-side in custom draggable panes

Browse all 98+ conversion calculators by unit dimension

Mission, privacy principles, and local browser processing architecture

Common questions about security, offline use, and accuracy

Get in touch with feedback, bug reports, or tool suggestions

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100% client-side data guarantee — zero tracking or telemetry

Terms and licensing conditions for using Rocking Tools

Copyright compliance and intellectual property notice

WCAG 2.1 AA accessibility standards and keyboard support