Darmowe narzędzia online
268+ free online tools for PDF, images, SEO, developers, color, and productivity. Fast, browser-based, and private — no signup, no installs, no limits. Search above or browse by category below.
Total tools26810.8K total uses
Categories13Active categories
Most usedJSON Formatter4.1K uses
Recently addedExperiment RandomizerNewest tool
Port Scanner
Scan common TCP ports on a public host — check which services are reachable from the server.
Used 1 times•Updated 7 minutes ago
HTTP Header Checker
Inspect HTTP response headers for any URL. Review security headers, caching directives, CORS, and server metadata.
Used 1 times•Updated 47 minutes ago
User Agent Parser
Parse user agent strings to identify browser, engine, operating system, device type, and bot detection.
Used 1 times•Updated 10 minutes ago
SQL Minifier
Minify SQL queries by removing extra whitespace and optional comments, with keyword casing controls.
Used 1 times•Updated 33 minutes ago
Salary Calculator
Convert salary between annual, monthly, weekly, biweekly, daily, and hourly pay with optional tax estimates.
Used 1 times•Updated 32 minutes ago
SKU Generator
Generate product SKU codes from brand, category, product, color, size, and variant fields with custom separators and sequences.
Used 1 times•Updated 32 minutes ago
Molar Mass Calculator
Molar mass calculator free — parse chemical formulas like H2O or Ca(OH)2 and get g/mol with an element breakdown. Browser-based, instant, no signup.
Used 1 times•Updated 4 minutes ago
Mole Calculator
Mole calculator free — convert between grams, moles, and particles using molar mass. Instant chemistry stoichiometry in your browser, no signup.
Used 1 times•Updated 5 minutes ago
Empirical Formula Calculator
Empirical formula calculator free — find simplest formula from mass % or element masses. Mole ratios in your browser, no signup.
Used 1 times•Updated 3 minutes ago
Ideal Gas Law Calculator
Ideal gas law calculator free — solve PV=nRT for pressure, volume, moles, or temperature. atm, kPa, L, K, °C. No signup.
Used 1 times•Updated 46 minutes ago
Atomic Mass Calculator
Atomic mass calculator free — IUPAC element lookup or weighted isotope average. Atomic number and u/g/mol. No signup.
Used 1 times•Updated 6 minutes ago
Periodic Table Explorer
Interactive periodic table with element details, atomic mass, and electron configuration for all 118 elements.
Used 1 times•Updated 4 minutes ago