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104 free developer tools: JSON, XML, HTML, CSS, JavaScript and SQL formatters, minifiers, converters, encoders, hash and text tools.

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JSON Tools 16

Format, validate, view, query and convert JSON - and turn it into code classes.

JSON FormatterBeautify JSON with 2 / 4 spaces or tabs, optionally sort keys; errors show the exact line and column. Popular JSON ValidatorCheck that JSON is valid; the first error is reported with line and column and highlighted. Popular JSON MinifierRemove all whitespace from JSON to make it as small as possible. JSON ViewerExplore JSON as a collapsible tree with types, counts and copyable paths. Popular JSON to XMLConvert JSON to XML: "@" keys become attributes, arrays repeat the element. JSON to CSVTurn an array of objects into CSV (nested keys flattened with dots), ready for Excel. Popular JSON to TSVTurn JSON records into tab-separated values. JSON to YAMLConvert JSON to clean, readable YAML. JSON Sort KeysSort every object key alphabetically (deep) for stable diffs. JSON EscapeEscape text so it can be placed inside a JSON string. JSON UnescapeTurn an escaped JSON string back into plain text. JSON to TypeScriptGenerate TypeScript interfaces from a JSON sample (nested objects and arrays included). Popular JSON to Go StructGenerate Go structs with json tags from a JSON sample. JSON to Java ClassGenerate Java classes (POJOs) with getters and setters from JSON. JSON to Python DataclassGenerate Python dataclasses with type hints from JSON. JSONPath TesterQuery JSON with JSONPath ($..price, filters [?(@.price > 4)]) and see every match with its path.

XML Tools 7

Format, validate and minify XML, convert it to JSON or YAML.

XML FormatterPretty-print XML with your indent; errors show line and column. DOCTYPEs are never expanded. Popular XML ValidatorCheck that XML is well-formed: unclosed or mismatched tags, duplicate attributes, bad entities. XML MinifierRemove whitespace between elements and comments from XML. XML to JSONConvert XML to JSON: attributes as "@" keys, repeated elements as arrays, numbers and booleans detected. Popular XML to YAMLConvert XML to YAML through the same JSON rules. XML ViewerExplore XML as a tree (converted to JSON structure). XML EscapeEscape & < > " ' so text is safe inside XML.

HTML, CSS & JavaScript 12

Beautify and minify HTML, CSS, SCSS, LESS, JavaScript and TypeScript.

HTML BeautifierIndent HTML (inline CSS and JavaScript included) so it is easy to read. Popular HTML MinifierRemove comments and whitespace between tags (pre, textarea, script and style are kept). CSS BeautifierFormat CSS with one declaration per line. Popular CSS MinifierRemove comments, spaces and the last semicolons to shrink CSS. SCSS FormatterFormat SCSS (Sass) with Prettier. LESS FormatterFormat LESS with Prettier. JavaScript BeautifierFormat JavaScript with js-beautify (fast) or Prettier (opinionated). Popular JavaScript MinifierMinify and mangle JavaScript with Terser (ES2024), with the size saving. Popular JavaScript ValidatorCheck JavaScript syntax (ES2024); the error shows line and column. TypeScript FormatterFormat TypeScript and TSX with Prettier. HTML to TextStrip tags and scripts from HTML and keep the readable text. HTML ViewerPreview HTML in a sandbox (scripts disabled) next to the code.

Code Formatters 9

SQL with dialects, YAML, GraphQL, Markdown, PHP, Java, C# and C++.

SQL FormatterFormat SQL for MySQL, PostgreSQL, SQL Server, Oracle, SQLite, BigQuery and more. Popular SQL MinifierRemove comments and extra whitespace from SQL (strings are kept). YAML FormatterFormat YAML with Prettier (comments kept). Popular YAML ValidatorCheck YAML syntax and see the parsed structure as JSON. GraphQL FormatterFormat GraphQL queries, mutations and schemas. Markdown FormatterNormalise Markdown: headings, lists, tables and code blocks. PHP FormatterFormat PHP code with Prettier PHP. Java / C# / C++ BeautifierRe-indent brace languages: Java, C#, C, C++, Go, Kotlin, Swift, Dart. JSON5 / JSONC FormatterFormat JSON with comments and trailing commas (tsconfig, VS Code settings).

Converters 16

CSV, TSV, YAML, HTML tables, numbers, timestamps, colors and more.

CSV to JSONConvert CSV (auto delimiter, quoted fields, header row) to JSON with numbers and booleans detected. Popular TSV to JSONConvert tab-separated values to JSON. CSV to XMLConvert CSV rows to XML elements. YAML to JSONConvert YAML (anchors, multi-line strings) to JSON. Popular CSV to HTML TableTurn CSV into an HTML <table> with a header row. JSON to HTML TableTurn a JSON array of objects into an HTML table. Number Base ConverterConvert numbers between binary, octal, decimal and hexadecimal (one per line, big numbers OK). Unix Timestamp ConverterConvert Unix timestamps (seconds or milliseconds) to dates and dates back to timestamps. Popular Color ConverterConvert colors between HEX, RGB(A) and HSL(A), one per line. Text to BinaryConvert text (UTF-8) to binary bytes. Binary to TextConvert binary bytes back to UTF-8 text. Text to HexConvert text (UTF-8) to hexadecimal bytes. Hex to TextConvert hexadecimal bytes back to UTF-8 text. Roman Numeral ConverterConvert numbers to Roman numerals and back (1-3999), one per line. Query String to JSONTurn a URL query string into JSON (repeated keys become arrays). JSON to Query StringTurn a flat JSON object into a URL query string.

Encode & Decode 11

Base64, URL, HTML entities, JWT, Unicode escapes, Morse and ROT13.

Base64 EncodeEncode text (UTF-8, Thai and emoji included) to Base64 or Base64URL. Popular Base64 DecodeDecode Base64 or Base64URL back to UTF-8 text. Popular URL EncodePercent-encode text for URLs (component or full URL). URL DecodeDecode percent-encoded URLs and query strings. HTML EncodeEscape < > & " ' (and optionally all non-ASCII) as HTML entities. HTML DecodeTurn HTML entities (&, é,  ) back into characters. JWT DecoderDecode a JSON Web Token: header, payload, expiry (nothing is sent anywhere). Popular Unicode EscapeEscape non-ASCII characters as \uXXXX (JavaScript / Java / JSON style). Unicode UnescapeTurn \uXXXX, \u{1F44B} and \xXX escapes back into characters. Morse Code TranslatorTranslate text to Morse code and back (detected automatically). ROT13Encode or decode ROT13 (letters shifted by 13).

Hash & Security 10

MD5, SHA family, HMAC, CRC32, password generator and strength check.

MD5 Hash GeneratorGenerate the MD5 hash of text (UTF-8), computed in your browser. Popular SHA-1 Hash GeneratorGenerate the SHA-1 hash of text (UTF-8), computed in your browser. SHA-256 Hash GeneratorGenerate the SHA-256 hash of text (UTF-8), computed in your browser. Popular SHA-384 Hash GeneratorGenerate the SHA-384 hash of text (UTF-8), computed in your browser. SHA-512 Hash GeneratorGenerate the SHA-512 hash of text (UTF-8), computed in your browser. CRC32 ChecksumGenerate the CRC32 Checksum hash of text (UTF-8), computed in your browser. All HashesMD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 of the same text at once. HMAC GeneratorHMAC-SHA256 / SHA-384 / SHA-512 signature of a message with a secret key (hex). Password GeneratorStrong random passwords from your browser's secure random generator. Popular Password Strength CheckerEstimate how strong a password is (checked locally, never sent).

Generators 6

UUIDs, Lorem Ipsum, random data, mock JSON and QR codes.

UUID GeneratorGenerate random UUID v4 or time-ordered UUID v7 values. Popular Lorem Ipsum GeneratorPlaceholder text by paragraphs, sentences or words, plain or as <p> HTML. Random Number GeneratorRandom integers in a range, unique if you like. Random String GeneratorRandom strings / tokens (hex, alphanumeric, Base64URL) for keys and IDs. Mock JSON GeneratorRealistic fake user records (names, emails, cities, dates) as JSON for testing. QR Code GeneratorQR codes for URLs, text, Wi-Fi or contact cards - download as PNG or SVG. Popular

Text Tools 14

Count characters and words, change case, clean lines, compare texts.

Character CounterCharacters, words, sentences, reading time - Thai words segmented, 30+ platform limits. Popular Word CounterCount words in English and Thai, unique words, reading and speaking time. Keyword Density CheckerMost used words and 2- or 3-word phrases with their density. Case ConverterUPPER, lower, Title, Sentence, camelCase, snake_case, kebab-case and more. Remove Duplicate LinesKeep the first copy of every line (optionally ignore case and spaces). Sort LinesSort lines A-Z, Z-A, by length or naturally (2 before 10); Thai alphabet supported. Reverse TextReverse characters, words or line order. Remove Extra SpacesCollapse repeated spaces and tabs, trim every line. Remove Line BreaksJoin lines into one paragraph (or keep paragraph breaks). Remove Empty LinesDelete blank lines (or lines with only spaces). Add Line NumbersPrefix every line with its number. Find and ReplaceReplace text or regular expressions everywhere at once. URL Slug GeneratorTurn titles into clean URL slugs (accents removed, Thai kept). Text Compare (Diff)Compare two texts line by line: added lines in green, removed in red. Popular

Developer Utilities 3

Regex tester, URL parser and cron expression explainer.

Regex TesterTest JavaScript regular expressions: live highlights, groups and replace. Popular URL ParserSplit a URL into protocol, host, port, path, query parameters and hash. Cron Expression ExplainerExplain a cron schedule (5 or 6 fields) in plain English.

Why BeautifyNex

Developer tools that respect your code

Private by design

Formatting, conversion and hashing run in your browser. Nothing is uploaded unless you share a link or save to your library.

Exact errors

Invalid JSON, XML, YAML or JavaScript is reported with line and column and highlighted in the editor.

Real engines

Prettier, js-beautify, Terser and sql-formatter with 10 SQL dialects - the same engines teams use in CI.

Your cloud library

Sign in to save results with folders, tags, versions and history, and share read-only links.

Thai-ready

UTF-8 everywhere: Base64, URL encoding, hashes and counters handle Thai and emoji correctly.

Code from JSON

Generate TypeScript interfaces, Go structs, Java classes and Python dataclasses from a JSON sample.

Simple rental pricing

Rent BeautifyNex monthly or yearly

Start free. Upgrade when you need more space and bigger files. Cancel any time.

2 months free on yearly

Prices in Thai baht including 7% VAT. Tax invoices are issued automatically.

Frequently asked questions

Do I need an account?

No. All 100+ tools run in your browser without an account. Sign in free to keep results in your cloud library with folders, versions and history.

How does billing work?

Choose a plan and pay monthly or yearly by PromptPay or card. Yearly plans cost 10 months. You get a tax invoice for every payment and can cancel any time — the plan stays active until the end of the period.

Can I change or cancel my plan?

Upgrades apply immediately with a prorated credit. Downgrades and cancellations take effect at the end of your current billing period.

Who can see a shared link?

Anyone with the link can read the shared result - nobody can edit it. You can stop sharing at any time.

Is my code sent to a server?

No. Formatting, minifying, conversion, encoding and hashing run in your browser. Only "Share" and "Save" send the result to BeautifyNex, and "Open URL" fetches through our server when you are signed in.

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