yutils

Convert colors between HEX, RGB, and HSL with a live preview swatch. Auto-detects any of the three input formats.

Convert an image file to a Base64 data URI for inline embedding in HTML/CSS/Markdown. Up to 5 MB.

Resize, crop, and compress images entirely in your browser. Pick width × height, choose crop or fit mode, adjust JPEG quality. Outputs as {original}_{w}x{h}.{ext}.

Crop images right in your browser — drag to select, lock aspect ratios (1:1, 16:9…), export PNG/JPEG. No upload.

Pick and copy emojis with one click. Search by name (en/ko), browse by category, and keep your recents and favorites in the browser.

Generate a QR code from any text or URL. Adjustable error correction (L/M/Q/H), SVG output, downloadable.

Check the WCAG contrast ratio between two colors. Pass/fail for AA Normal/Large + AAA Normal/Large with a live sample.

Generate a palette from a single base color — shades, tints, complement, analogous, triad, tetrad. HSL-based. 0 dependency.

Build linear, radial, and conic CSS gradients with color stops + angle/position. Live preview + copy-ready CSS.

Merge multiple PDF files into a single document. Drag to reorder pages, all client-side — files never leave your browser.

Extract a page range from a PDF — e.g. 1-3,5,7-9. All client-side, files never leave your browser.

Rotate all or selected PDF pages by 90°, 180°, or 270°. Useful for scanned documents in wrong orientation. All client-side.

Add a text watermark (CONFIDENTIAL, DRAFT, etc.) to every PDF page. Control opacity, rotation, size, color. All client-side.

Re-encode a PDF with object stream compression and metadata stripping. Modest size reduction (text-heavy: 5-20%). Image-heavy PDFs need server-side tools. All client-side.

Combine JPG, PNG, and other images into a single PDF — in your browser. Reorder pages, choose A4/Letter or original size. Nothing is uploaded.

Make a favicon from an image, emoji, or text — multi-size favicon.ico, apple-touch-icon, PWA icons + ready HTML/manifest snippets, in your browser.