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All tools
Formatters
Format, minify and validate JSON, XML, SQL, Markdown and other structured text
JSON ViewerThree views (tree / table / graph) for JSON: search, diff, schema inference — large files parsed off-thread.XML FormatterPretty-print, minify and basic syntax check for XML; auto-indent and attribute alignment.SQL FormatterPretty-print, minify and toggle keyword case. Works with MySQL / Postgres / Oracle / SQL Server.HTML / CSS FormatterPretty-print and minify HTML and CSS; auto-indent and attribute wrap.Markdown PreviewLive Markdown editor with side-by-side preview; GFM tables, code highlight, task lists.JSON Schema ValidatorValidate JSON against a Schema (Draft-07 / 2020-12) with field-level error paths.Markdown Table GeneratorEdit a table in a visual grid and generate clean, aligned Markdown. Per-column left/center/right alignment, CSV/TSV import, live HTML preview, copy and .md download.JSON DiffStructurally compare two JSON documents ignoring key order; lists added, removed and changed entries with old→new values, with optional array-order-insensitive matching.
Encode & Crypto
Base64, URL, hash, JWT and symmetric encryption
Base64 Encode / DecodeText, files and images ↔ Base64 (standard / URL-safe / MIME).URL Encode / DecodeURL encode and decode, handling Chinese and special characters.Hash GeneratorMD5 / SHA1 / SHA256 / SHA512 digests for text or files.UUID GeneratorBulk-generate UUID v4 with optional hyphens and case toggles.JWT DecoderSplit a JWT into three sections, Base64-decode + pretty JSON + expiry hint.AES / DES CryptoSymmetric encrypt and decrypt with multiple modes and paddings.Password GeneratorGenerate strong random passwords in bulk using the browser's cryptographic RNG. Customize length, character sets and symbols, exclude ambiguous chars, and see live entropy strength.Unicode ConverterConvert text to/from \uXXXX, ES6, &#x;, &# and \xHH escapes, with full surrogate-pair and astral code-point support.HTML EntitiesConvert between plain text and HTML entities: encode as named entities or decimal / hex numeric references, escaping only HTML-unsafe characters or all non-ASCII; decode &name;, &#NN; and &#xNN; references back to characters (astral/Emoji safe).
Converters
Convert between formats and units — timestamps, radix, colors, YAML
Timestamp ConverterUnix ↔ datetime conversion (seconds / ms, any timezone).YAML / JSON ConverterTwo-way YAML ↔ JSON conversion with error positions.Radix ConverterConvert between binary, octal, decimal and hex; supports negatives and big integers.Color ConverterHEX ↔ RGB ↔ HSL with color picker and live swatch.Properties / YAMLConvert between Spring Boot .properties and YAML, handles nesting and arrays.Naming ConverterConvert between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE.Chinese → PinyinConvert Chinese to pinyin: full / initials / with tones / polyphones.XML / JSON ConverterTwo-way XML ↔ JSON; preserves attributes, text nodes, namespaces.Date CalculatorAdd / subtract days, months, years; compute date diffs and business days.CSV ⇄ JSONConvert between CSV and JSON in both directions with custom delimiters and header detection.RMB Capital AmountConvert numeric amounts into the standard Chinese financial capital form (人民币大写), with correct yuan/jiao/fen, zero handling, and grouped output.Unit ConverterConvert data, time, length, weight, temperature and area units in real time. See every unit at once, with both decimal and binary byte units supported.
Text
Regex, diff, dedupe, character counting and other text utilities
Regex TesterLive regex match / replace with highlights, group capture and a template library.Text DiffDiff two pieces of text by char / word / line with highlighting.Dedupe / SortBatch dedupe, sort, reverse, trim — line-oriented text processing.Character CounterLive count of characters, words, lines and bytes (UTF-8).Placeholder ReplaceReplace ${var} placeholders in a template from a variables table.Log MaskingAuto-mask phones, IDs, bank cards, emails and other PII in logs.String EscapeEscape or unescape strings using JSON, Java, JavaScript, SQL, C/C++ or Shell rules.
Dev helpers
Cron, HTTP, mock data, IP calc, QR codes — dev and ops helpers
Cron ExpressionExplain a Cron expression and preview the next N firings (5 / 6 field syntax).HTTP ClientLightweight in-browser HTTP debugger, like a mini Postman.SQL → EntityParse CREATE TABLE into a Java POJO with Lombok / JPA annotations.MyBatis Log → SQLRe-assemble Preparing / Parameters lines into executable SQL.IP CalculatorIPv4 + mask / CIDR → network, broadcast, usable hosts.Lombok GeneratorBulk-add {'@'}Data / {'@'}Builder / ... Lombok annotations to a Java class.Mock Data GeneratorGenerate fake names, emails, phones in bulk; export JSON / SQL / CSV.JSON → SQLTurn a JSON array into INSERT / REPLACE statements with a custom table name.QR CodeEncode text / URL / Wi-Fi into QR codes; decode QRs from uploaded images.JSON to TypesInfer type definitions from JSON for TypeScript, Go, Java and Kotlin — auto-names nested types, merges object shapes across array items, and marks nullable fields.HTTP Status & MIME Cheat-SheetQuick reference for HTTP status codes and MIME types with live filtering and click-to-copy. Status codes are color-coded by class (2xx/3xx/4xx/5xx), covering ~60 standard codes and 60+ common MIME types.curl to CodeConvert a curl command into ready-to-use request code for Fetch, Axios, Python requests, Go and Java. Parses method, URL, headers, body and basic auth automatically.JSONPath TesterQuery JSON with JSONPath expressions and preview matched values live.gitignore GeneratorPick common stacks like Node, Python and macOS to instantly build a de-duplicated .gitignore, then copy or download it.UA ParserParse any User-Agent string to detect browser, rendering engine, OS, device type and CPU architecture. One click fills in your own browser's UA.