In your browser
The developer's home
Format JSON, convert YAML, generate a password, read a JWT. Every utility runs on this device: what you paste is not sent to a server.
No account and no upload. The result shows up immediately.
Categories
- DataJSON, YAML, XML, CSV, and TOML in the browser.20
- EncodingBase64, URLs, hashes, hexadecimal, and text.18
- GeneratorsIdentifiers, passwords, config files, and sample data.20
- ValidatorsSyntax, formats, contrast, and local checks.21
- TimeDates, cron, percentages, bases, and units.18
- TextCounts, case, slugs, replacement, and cleanup.20
- FormattersIndent and convert HTML, CSS, SQL, Markdown, and other languages.20
- FrontendCSS, color, layout, and units in the browser.19
- PDFMerge, split, rotate, and read PDFs in this browser.18
- APIBuild requests, read URLs, and check tokens without sending the content to casadodev.19
- DevOpsCompose, Kubernetes, Git, Nginx, and permissions, as text.19
- DatabaseSQL, MongoDB, Redis, and connection strings, without connecting to a database.18
- SEOMeta tags, sitemaps, robots files, and structured data.19
Everyday tools
- JSON formatterTurn JSON into readable indentation, or keep it compact.
- JSON validatorCheck that text is valid JSON and see the root value type.
- JSON to YAMLConvert valid JSON into YAML.
- YAML to JSONConvert YAML into formatted JSON.
- Base64Encode and decode Base64 text, including accented characters.
- URL encoderEncode or decode a URL component.
- UUID generatorGenerate version 4 UUIDs with the browser's generator.
- Password generatorCreate passwords with the browser's cryptographic generator.
- QR code generatorCreate a PNG QR code from text or a link.
- Cron generatorBuild a five-field cron expression and read what it means.
- Regex testerTest a JavaScript regular expression against text.
- JWT decoderRead the header and payload of a JSON Web Token.
- Timestamp converterConvert a Unix timestamp to a date and a date to a timestamp.
- Text diffSee what changed between two texts, line by line.
- Word counterCount words, characters, and lines as you type.
- SQL formatterIndent a SQL query so it is easier to read.
- HTML formatterIndent HTML for reading.
- CSS formatterIndent CSS for reading.
- Markdown previewSee how Markdown renders, without executing raw HTML.
- PX to REMConvert pixels and rem using the base you choose.