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371+ 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 tools37110.7K total uses
Categories15Active categories
Most usedJSON Formatter4.1K uses
Recently addedSketchbook AINewest tool
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.
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Mole Calculator
Mole calculator free — convert between grams, moles, and particles using molar mass. Instant chemistry stoichiometry in your browser, no signup.
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Chemical Equation Balancer
Chemical equation balancer free — balance reactions like H2 + O2 → H2O with correct coefficients. Instant stoichiometry in your browser, no signup.
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Solution Concentration Calculator
Solution concentration calculator free — molarity, mass/volume, and dilution (C1V1=C2V2). Chemistry lab prep in your browser, no signup.
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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.
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Normality Calculator
Normality calculator free — convert N, molarity, and equivalents per mole. Find normality from mass and volume. Chemistry titration prep in your browser.
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Molality Calculator
Molality calculator free — find mol/kg from moles and solvent mass. Convert grams to molality using formula lookup. Chemistry in your browser.
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Dilution Calculator
Dilution calculator free — solve C1V1=C2V2 for stock concentration, volumes, or final strength. Lab prep in your browser, no signup.
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pH Calculator
pH calculator free — find pH, pOH, and ion concentrations from [H⁺], [OH⁻], or strong acid/base molarity. Instant, no signup.
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pOH Calculator
pOH calculator free — find pOH, pH, and [OH⁻] from hydroxide concentration or strong base molarity. Instant, no signup.
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Buffer Calculator
Buffer calculator free — Henderson-Hasselbalch pH for acid and base buffers. Solve pH, pKa, or concentrations. Instant, no signup.
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Percent Yield Calculator
Percent yield calculator free — find % yield, actual yield, or theoretical yield in grams or moles. Stoichiometry lab prep, no signup.
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