All Tools - Page 3
216 tools available
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Current Converter
Convert between different units of electric current measurement including amperes, milliamperes, abamperes, statamperes, and more. Essential for electrical engineering and electronics applications.
Data Size Converter
Convert between different data size units including bytes, kilobytes, megabytes, gigabytes, terabytes and more. Supports both binary (1024) and decimal (1000) calculations.
Data Transfer Rate Converter
Convert between different units of data transfer rate measurement including bits per second, bytes per second, kilobits, megabytes, gigabits, and more. Essential for networking, telecommunications, and data storage applications.
Date Calculator
Calculate days between two dates, add or subtract days, weeks, months and years, count business days with US, UK, Canada, Australia and Germany public holidays, and run a live countdown. Timezone-proof civil-date arithmetic, entirely in your browser.
Day of the Week Finder
Find what day of the week any date falls on. Perfect for historical research, event planning, and satisfying curiosity about past or future dates.
Decibel Calculator & Sound Level Converter
Convert decibel levels to and from the physical quantity behind them — dB SPL ↔ pascals, dB SWL ↔ watts, dBm, dBW, dBV, dBu and dBFS — add levels by energy, apply distance attenuation, and compute IEC 61672-1 A- and C-weighting at any frequency.
Density Converter
Convert between different units of density measurement including kg/m³, g/cm³, lb/ft³, oz/in³, and more. Essential for materials science, engineering, and physics applications.
DKIM Record Checker
Look up and validate DKIM (DomainKeys Identified Mail) records for any domain and selector. Auto-discovers common selectors used by Google Workspace, Microsoft 365, SendGrid, Mailgun and others. Validates public key length (1024 vs 2048-bit), signing algorithm (RSA-SHA256), and record syntax for email authentication compliance.
DMARC Generator & Checker
Build a valid DMARC (Domain-based Message Authentication, Reporting & Conformance) DNS record interactively, or check an existing DMARC policy for any domain. The generator walks you through every tag — policy (p=), pct, aggregate reports (rua), forensic reports (ruf), alignment modes (adkim, aspf), and reporting interval — with inline explanations. The checker parses any published DMARC record and flags syntax issues, missing required tags, and report-address (rua/ruf) problems such as a missing mailto: prefix. If the domain has no record, it uses the organizational domain's record, as receivers do.
DNS Lookup Tool
Resolve domain names to IP addresses and fetch DNS records (A, AAAA, MX, TXT, CNAME, etc.). Perfect for network diagnostics, domain analysis, and troubleshooting DNS issues.
Email Header Analyzer & Tracer
Paste full email headers and see the message's delivery path, SPF/DKIM/DMARC verdicts as recorded by the receiving server, a risk score, and per-hop server details. Surfaces phishing red flags including authentication failures, brand-impersonating display names (e.g. "PayPal Support" sent from an unrelated domain), and elevated risk scores — useful even when SPF/DKIM/DMARC technically pass.
Email Validator
Quickly check if an email address is valid. Validates email format and syntax in your browser and gives detailed feedback on common issues, including likely domain typos.
Energy Converter
Convert between different units of energy measurement including joules, calories, BTU, kilowatt-hours, electron volts, and more. Perfect for physics, engineering, and energy calculations.
Epoch & Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and back, in any IANA timezone. Auto-detects seconds, milliseconds, microseconds and nanoseconds, handles negative (pre-1970) values, flags Year-2038 overflow, and converts whole lists in batch with CSV export.
Extract Emails/URLs Tool
Extract email addresses and URLs from text. Useful for parsing contact information, finding links in content, or cleaning up data from various sources.
Fake IBAN Generator
Generate fake IBAN numbers for testing purposes. Choose from multiple countries and specify the number of IBANs to generate.
Favicon Generator
Transform text, emojis, or images into complete favicon sets. Generates all essential sizes for web browsers, mobile devices, and desktop applications. Includes ZIP download with files and ready-to-use code for HTML, React, Vue, Angular, and Next.js.
Flow Rate Converter
Convert between different flow rate units including liters per second, gallons per minute, cubic meters per hour, and more
Force Converter
Convert between different units of force measurement including newtons, pounds-force, dynes, kilogram-force, and more. Perfect for physics, engineering, and mechanical calculations.
Frequency Converter
Convert between different frequency units including Hz, kHz, MHz, GHz, and THz. Quick and accurate frequency conversions for electronics and physics applications.
Fuel Efficiency Converter
Convert between different units of fuel efficiency measurement including miles per gallon (MPG), liters per 100 kilometers (L/100km), kilometers per liter, and more. Essential for automotive and transportation calculations.
GitIgnore Generator
Generate .gitignore files for any programming language, framework, or development environment. Create gitignore files by combining multiple templates including Node.js, Python, Java, React, and more.
Hash Identifier & Analyzer
Identify and analyze hash types from hash strings. Supports MD5, SHA-1, SHA-2, SHA-3, bcrypt, Argon2, scrypt, PBKDF2, and more. Analyzes hash format, length, and characteristics to determine the most likely hashing algorithm used.
HEIC to JPG Converter
Convert HEIC and HEIF photos from your iPhone to universally compatible JPG images — entirely in your browser. Batch convert up to 5 files with adjustable quality, no upload, no server processing.