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Free online tools that run entirely in your browser.
No uploads. No installs. No tracking. Just open and use.
How much BTC do you need to retire? Live price data, DCA backtester, and three lifestyle tiers (minimal / comfortable / rich).
Calculate BTC trading profit, loss, ROI, and fees instantly. Includes break-even price and custom fee rates.
What if you had bought Bitcoin earlier? See how much your investment would be worth today with real historical price data.
Backtest your Bitcoin dollar-cost averaging strategy with real historical data. Compare DCA vs lump sum investing.
Convert between Bitcoin (BTC), Satoshi (sats), and USD instantly. Live prices and quick reference table.
Compress images online free — reduce JPG, PNG, WebP file size in your browser. No upload, instant download.
Bulk flip images online free — batch mirror 50+ photos at once, horizontal or vertical. No upload, no install.
Rotate images 90°, 180°, 270° instantly. Fix orientation issues in bulk, no upload required.
Convert Markdown to JSON online — bidirectional MD↔JSON converter. Also converts JSON arrays to Markdown tables.
Convert Markdown to PDF free online. GitHub, Academic & Minimal styles. A4 & Letter. No upload required.
Calculate how much time you save listening to audiobooks at different playback speeds.
Chrome extension for downloading Instagram images and videos. Fast and secure — 2,000+ active users.