Free Online Tools
184+ 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 collection below.
Total tools18410.7K total uses
Categories11Active categories
Most usedJSON Formatter4.1K uses
Recently addedElectron Configuration GeneratorNewest tool
Solution Concentration Calculator
Solution concentration calculator free — molarity, mass/volume, and dilution (C1V1=C2V2). Chemistry lab prep in your browser, no signup.
Used 0 times•Updated never
Molarity Calculator
Molarity calculator free — find M, moles, or volume with M=n/V. Convert mass to molarity using formula lookup. Instant chemistry in your browser.
Used 0 times•Updated never
Normality Calculator
Normality calculator free — convert N, molarity, and equivalents per mole. Find normality from mass and volume. Chemistry titration prep in your browser.
Used 0 times•Updated never
Molality Calculator
Molality calculator free — find mol/kg from moles and solvent mass. Convert grams to molality using formula lookup. Chemistry in your browser.
Used 0 times•Updated never
Dilution Calculator
Dilution calculator free — solve C1V1=C2V2 for stock concentration, volumes, or final strength. Lab prep in your browser, no signup.
Used 0 times•Updated never
pH Calculator
pH calculator free — find pH, pOH, and ion concentrations from [H⁺], [OH⁻], or strong acid/base molarity. Instant, no signup.
Used 0 times•Updated never
pOH Calculator
pOH calculator free — find pOH, pH, and [OH⁻] from hydroxide concentration or strong base molarity. Instant, no signup.
Used 0 times•Updated never
Buffer Calculator
Buffer calculator free — Henderson-Hasselbalch pH for acid and base buffers. Solve pH, pKa, or concentrations. Instant, no signup.
Used 0 times•Updated never
Percent Yield Calculator
Percent yield calculator free — find % yield, actual yield, or theoretical yield in grams or moles. Stoichiometry lab prep, no signup.
Used 0 times•Updated never
Empirical Formula Calculator
Empirical formula calculator free — find simplest formula from mass % or element masses. Mole ratios in your browser, no signup.
Used 0 times•Updated never
Molecular Formula Calculator
Molecular formula calculator free — find true formula from empirical formula and molar mass, or composition plus experimental M. No signup.
Used 0 times•Updated never
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 0 times•Updated never