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HTML entity encoder and decoder changelog

What changed in the HTML entity encoder and decoder, newest first.

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v0.15.0

Released November 1, 2026

  • ToolA new entities tool encodes and decodes HTML entities.

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One value per line.ValidationHTML entity encoder and decoderEscape text for HTML with named, decimal or hex entities, or turn entities such as & and é back into characters.EncodingEscape and unescape stringsEscape text for a JSON or JavaScript string, a SQL string, a CSV field, a regular expression or a shell word, or undo the escaping.EncodingEAN, UPC and GTIN check digitsCheck the check digit of an EAN-8, EAN-13, UPC-A or GTIN-14, add a missing one, read the country from the GS1 prefix and convert between ISBN-10 and EAN-13. One code per line.ValidationTest data generatorGenerate valid-looking test IBANs, BSNs, EAN barcodes and EU VAT numbers in bulk. They pass the checks, but belong to no one.GeneratorsSQL formatter and minifierFormat SQL so each clause sits on its own line, or minify it onto one line, for MySQL, PostgreSQL, SQLite, SQL Server and BigQuery.FormattingNumber base converterConvert numbers between binary, octal, decimal, hex and any base from 2 to 36, with big numbers, two's complement and a bit view.EncodingYAML, TOML and JSON converterConvert between JSON, YAML and TOML, or validate and pretty-print a document, with the line and column of every error.FormattingCSV and JSON converterConvert CSV to a JSON array of objects or arrays, or JSON back to CSV. Detects the delimiter and reads Dutch Excel files with semicolons and decimal commas.DataGlob and .gitignore testerTest glob patterns and .gitignore rules against a list of paths and see which paths match and which rule matched them.TextColour converterConvert a colour between HEX, RGB, HSL, HWB and OKLCH, check its WCAG contrast against a background, or build a Material 3 tonal palette from it.Formattingchmod calculatorConvert Unix file permissions between octal (755), letters (rwxr-xr-x), ls -l and chmod clauses, with a checkbox grid and the setuid, setgid and sticky bits.SecurityUser-agent parserRead a user-agent string: browser, engine, OS, device type and whether it is a bot. Leave it empty to read your own browser.NetworkConvert cURL to codePaste a cURL command and get the same request as fetch, Axios, Python requests, Go or PHP. Nothing is run and nothing is sent.NetworkMarkdown previewWrite Markdown and see it rendered as you type, or copy the HTML. Raw HTML is shown as text and links are checked, so nothing in the preview can run.FormattingBarcode and QR code generatorMake a QR code, EAN-13, UPC-A, Code 128, ITF-14 or Data Matrix barcode, download it as SVG or PNG, or read a code from an image.GeneratorspagesChangelogWhat changed in each releasepagesAboutWhat codeknife.dev is and who makes itpagesIdeasSuggest improvements and vote on other visitors’ ideas.pagesPrivacyWhat leaves your browser and what is storedpagesAccessibilityConformance, known limitations and how to report a problempagesMembershipRemove ads and raise the limitspagesactions
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