Developer & security tools 47
Format JSON and code, test regex, convert data, passwords and hashes.
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Most used
All Developer tools
Data 14
- JSON formatter & validatorCheck JSON for errors, pretty-print it, or squeeze it onto one line.
- CSV / YAML / JSON converterConvert between CSV, YAML and JSON.
- Excel / CSV / JSON converterConvert a spreadsheet (XLSX, XLS, ODS) to CSV or JSON, or a CSV file to an Excel workbook — pick a sheet and preview it first.
- Chart makerPaste a table and get a bar, line, pie or doughnut chart to download as PNG or SVG.
- JSON differenceCompare two JSON documents and list what changed.
- JSON to XMLConvert JSON data into XML elements.
- XML converterConvert XML to JSON or CSV, and CSV or JSON back to XML — both directions.
- Font converterConvert TTF and OTF fonts to WOFF for the web, and WOFF fonts back to TTF or OTF.
- SQL formatterPretty-print SQL for 17 dialects on this device.
- Markdown previewWrite Markdown and see the formatted preview.
- XML formatter and validatorIndent, minify and check XML; shows the line of any error.
- JSON to TypeScriptTurn JSON into TypeScript interfaces.
- Markdown table generatorTurn CSV or spreadsheet cells into a neat Markdown table.
- HTML to MarkdownConvert HTML into clean Markdown.
Code 6
- Code formatterTidy messy JavaScript, CSS or HTML indentation.
- Regex testerTest a regular expression and see every match highlighted.
- CSS minifierLocal conversion with a reviewed output.
- JavaScript minifierParser-based whitespace and comment reduction. Code is never run.
- URL encode / decodeMake text safe for a URL, or turn %20-style codes back into text.
- HTML encode / decodeTurn <, > and & into HTML entities, or decode them back.
Colour 2
Network & time 8
- Timestamp and timezone converterConvert Unix timestamps to dates and between time zones.
- Cron expression builderBuild a cron schedule and read it in plain words.
- IPv4 subnet calculatorNetwork, broadcast, hosts and masks from a CIDR.
- IPv4 to binaryShow an IPv4 address in binary, octet by octet.
- HTTP status, headers, MIMESearchable offline reference for status codes, headers and file types.
- Number bases + chmodConvert decimal/hex/octal/binary and file permissions.
- Webcam testCheck a local camera preview with no recording or upload.
- Keyboard key code testerPress any key to see its key, code and modifier values.
SEO & web 5
- Meta tag and Open Graph generatorWrite page title, description and social tags with a search preview.
- robots.txt generatorMake a robots.txt with allow and block rules and a sitemap line.
- UTM link builderAdd campaign tracking tags to a link in the standard UTM format.
- URL parser and query editorSplit a link into its parts, edit query values and rebuild it.
- Social card (OG image) makerDesign a 1200×630 link-preview card and copy the Open Graph meta tags.
Passwords & 2FA 4
Hash & encrypt 5
- Hash generator (SHA-256, MD5)Get the SHA-256, SHA-512, SHA-1 or MD5 hash of text.
- AES text encryptionEncrypt or decrypt text with a password (AES-GCM).
- HMAC & RSA keysCompute HMACs and generate RSA key pairs, sign and verify.
- UUID / ULID generatorGenerate random UUID v4 or ULID identifiers.
- bcrypt hash and verifyHash a password with bcrypt or check a password against a hash.