Free Online Tools
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
Restaurant Profit Calculator
Calculate restaurant net profit, food and labor costs, prime cost ratio, and profit margins from sales and operating expenses.
Used 0 times•Updated never
Time Calculator
Calculate time differences and add or subtract hours, minutes, and seconds from any clock time.
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Tip Calculator
Calculate tip amount, total bill, and fair split per person with quick percentage presets.
Used 0 times•Updated never
Invoice Generator
Create professional invoices with line items, tax, and totals — preview, print, or download as PDF.
Used 0 times•Updated never
Receipt Generator
Create printable sales receipts with items, tax, payment details — preview, print, or download as PDF.
Used 0 times•Updated never
Quotation Generator
Create professional price quotations with line items, tax, and validity dates — preview, print, or download as PDF.
Used 0 times•Updated never
Unsloth Dataset Builder
Unsloth dataset builder free — create fine-tuning JSONL for Alpaca, chat messages, tool calls, or raw text. Import, validate, split train/eval, export.
Used 0 times•Updated never
Chemical Equation Balancer
Chemical equation balancer free — balance reactions like H2 + O2 → H2O with correct coefficients. Instant stoichiometry in your browser, no signup.
Used 0 times•Updated never
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.
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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.
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