Free, open-source, client-side tools. No server, no tracking, no BS.
Convert CSV data to JSON with custom delimiters, auto type detection, and drag & drop file support.
Generate placeholder text with character limit, multiple variants (Classic, Hipster, Tech), and HTML export.
Generate QR codes with custom colors, sizes, and error correction. Download as PNG or SVG. Supports URL, WiFi, vCard presets.
Convert between HEX, RGB, HSL, HSB, CMYK. Visual picker, sliders, and auto-generated palettes (shades, tints, complementary, triadic).
Test regular expressions with live match highlighting, capture group display, and common presets (email, URL, IP, phone, date).
Compare two texts side-by-side with line-level and word-level diff highlighting. Myers algorithm for accurate results.
Build CSS gradients visually. Linear, radial, conic types. Custom color stops, angle control, presets, and copy-ready CSS output.
Live markdown editor with split/editor/preview modes. GitHub-flavored markdown, tab support, copy HTML, and download .md file.