Text and web workflows

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Text cleanup, QR, HTML and color utilities

Create syntax-highlighted code PNGs with optional line numbers and light/dark themes.

Inspect hidden characters and limited visual lookalikes, or selectively remove character controls.

Recover text typed with the wrong Korean/English two-set keyboard mode.

Normalize filenames to NFC/NFD, resolve collisions and download a ZIP without changing originals.

Compare word-set, three-word phrase and cosine similarity between two local texts.

Format basic book/web references from author, year, title and publisher fields.

Generate QR PNGs from CSV rows and optionally include a printable label PDF.

Decode supported QR/barcodes from raster images and show their payload as text.

Calculate the contrast of two opaque sRGB colors against WCAG AA/AAA thresholds.

Preview color or image transformations using common full-severity color-vision approximations.

Generate robots.txt or locally check basic allow/disallow matching for a path.

Build sitemap XML files and an index from a same-origin URL list.

Create Schema.org JSON-LD or inspect basic structure and recommended fields.

Preview a local social card using supplied title, description and optional image.

Convert static HTML/SVG attributes, inline styles and empty elements to JSX.

Pack raster images into a sprite sheet with matching CSS and JSON coordinates.