Free Online Tools

Free rain animation overlay for photos — add realistic rain for reels and export at original image quality. Runs in your browser.

Free TTK calculator — estimate time-to-kill from damage per shot, fire rate, magazine size, and target health/armor multipliers.

Estimate YouTube ad revenue from views and RPM. See daily, monthly, and yearly earnings with monetized view rate adjustments.

Log daily work hours from clock times or direct entries, then calculate weekly totals, overtime, and gross pay.

Free Instagram profile mockup — design realistic IG profile screens with bio, stats, highlights, and grid. Save templates and export PNG.

Plan lab dilutions with pipette volumes, 1:N ratio dilutions, and serial dilution schemes. Get C₁V₁=C₂V₂ stock aliquots, sample and diluent volumes, and step-by-step bench procedures in µL, mL, or L. Free, browser-based.

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.

Solution concentration calculator free — molarity, mass/volume, and dilution (C1V1=C2V2). Chemistry lab prep in your browser, no signup.

Free color to Tailwind class converter — match any HEX or RGB color to the closest Tailwind CSS color utility.

Encode UTF-8 text to Base64 instantly in your browser with byte-size stats.

Configure CSS flexbox layout with a live preview and copy-ready CSS, inline styles, and Tailwind classes.

Calculate relative humidity, dew point, wet-bulb temperature, vapor pressure, absolute humidity, and mixing ratio from dry-bulb readings. Free, browser-based.