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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
RSA Decrypt
Decrypt RSA-OAEP JSON payloads with your private key, including hybrid RSA + AES-GCM ciphertext.
Used 1 times•Updated 2 minutes ago
Diff Checker
Compare two texts and highlight added, removed, and changed lines or words instantly in your browser.
Used 1 times•Updated 20 minutes ago
HTML Formatter
Format and beautify HTML markup with indentation, readable tag breaks, and optional minification.
Used 1 times•Updated 32 minutes ago
Protein Calculator
Estimate daily protein needs from body weight, training goals, and meal count with per-meal targets.
Used 1 times•Updated 12 minutes ago
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 1 times•Updated 19 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 22 minutes ago
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 1 times•Updated 21 minutes ago
Percent Yield Calculator
Percent yield calculator free — find % yield, actual yield, or theoretical yield in grams or moles. Stoichiometry lab prep, no signup.
Used 1 times•Updated 12 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 32 minutes ago
Oxidation Number Calculator
Find oxidation numbers in chemical formulas using standard rules — H2SO4, KMnO4, NH3, and polyatomic ions. Free, instant, browser-based.
Used 1 times•Updated 30 minutes ago
Punnett Square Generator
Generate Punnett squares for monohybrid and dihybrid crosses with custom trait names, parent labels, and genotype or phenotype ratios. Free, instant, browser-based.
Used 1 times•Updated 20 minutes ago