Free Online Tools
405+ 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 tools405Available free tools
Categories15Active categories
Most usedCSV to ExcelPopular right now
Recently addedInterval Music RepeaterNewest tool
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CSV to Excel
Convert CSV data into a downloadable Excel workbook (XLSX, XLS, ODS) in your browser, with delimiter detection and number parsing.
Matrix Calculator
Add, subtract, multiply, transpose, invert, and find determinants of matrices up to 6×6.
Atomic Mass Calculator
Atomic mass calculator free — IUPAC element lookup or weighted isotope average. Atomic number and u/g/mol. No signup.
RPG Dice Roller
Free RPG dice roller — roll classic NdX+M formulas like d20, 4d6, or 2d8+3. See each die face and totals instantly.
Agent Skill Suggester
Describe a task and get ranked AI agent skill suggestions for Cursor, Claude Code, and similar tools — with copy-ready prompts.
Subscriber Count Formatter
Free YouTube subscriber count formatter — convert raw numbers to 1.2K, 3.4M style counts for titles and bios.
Flashcard Flipper
Free flashcard practice tool — paste term|definition lines or use sample decks. Flip cards, mark Know/Don't know, and shuffle.
Altitude Pressure Calculator
Convert between altitude and atmospheric pressure using the barometric formula or ISA standard atmosphere. Pressure in hPa, inHg, kPa, and more. Free, browser-based.
AI Hashtag Generator
Generate relevant social media hashtags for Instagram, TikTok, LinkedIn, and more using your own AI API key.
HEIC to JPG PNG Converter
Free HEIC to JPG/PNG converter for iPhone photos. Convert HEIC/HEIF to JPEG or PNG in your browser — batch, preview, no server upload.
Expense Tracker
Log daily expenses by category, see spending totals, and review a breakdown — saved in your browser.
MX Record Lookup
Look up mail exchange (MX) DNS records for a domain, sorted by priority with mail host IP resolution.