# ToolDeck

> Free online developer tools — 95+ tools, 23 languages, no install, no signup required.

ToolDeck is a collection of free browser-based developer tools. All processing happens client-side — no data is sent to any server. Tools are available in 23 languages.

## JSON Tools

- [JSON Formatter](https://tooldeck.top/en/json/formatter): Format, beautify, and syntax-highlight JSON. Paste minified JSON and make it readable instantly.
- [JSON Validator](https://tooldeck.top/en/json/validator): Validate JSON syntax. Detect errors, missing brackets, and invalid values with detailed error messages.
- [JSON Diff](https://tooldeck.top/en/json/diff): Compare two JSON objects side-by-side. Spot added, removed, and changed keys visually.
- [JSON Pretty Print](https://tooldeck.top/en/json/pretty-print): Pretty-print JSON with 2 or 4 space indentation for readability.
- [JSON Minifier](https://tooldeck.top/en/json/minifier): Strip whitespace and compact JSON for APIs and production use.
- [JSON to YAML](https://tooldeck.top/en/json/to-yaml): Convert JSON to YAML format in one click.
- [JSON to CSV](https://tooldeck.top/en/json/to-csv): Convert JSON array to CSV with custom delimiter support.
- [JSON to TypeScript](https://tooldeck.top/en/json/to-typescript): Generate TypeScript interfaces from JSON automatically.
- [JSON to C# Class](https://tooldeck.top/en/json/to-csharp): Generate C# classes with JsonPropertyName attributes from JSON.
- [JSON to Go Struct](https://tooldeck.top/en/json/to-go-struct): Convert JSON to Go struct definitions with json tags.
- [JSON to Python](https://tooldeck.top/en/json/to-python): Generate Python dataclasses with type annotations from JSON.
- [JSON to Java](https://tooldeck.top/en/json/to-java): Generate Java POJO classes with getters and setters from JSON.
- [JSON to Dart](https://tooldeck.top/en/json/to-dart): Generate Dart classes with fromJson and toJson methods from JSON.
- [JSON to XML](https://tooldeck.top/en/json/to-xml): Convert JSON to XML format with custom root tag.
- [JSON to TOML](https://tooldeck.top/en/json/to-toml): Convert JSON to TOML configuration format.
- [JSONPath Tester](https://tooldeck.top/en/json/path-tester): Test JSONPath expressions against JSON data and see matching results.
- [JSON Schema Validator](https://tooldeck.top/en/json/schema-validator): Validate JSON data against a JSON Schema (Draft 7).
- [JSON String Escape](https://tooldeck.top/en/json/escape): Escape and unescape JSON special characters in strings.

## YAML Tools

- [YAML to JSON](https://tooldeck.top/en/yaml/to-json): Convert YAML config or data to valid JSON. Supports anchors and multiline strings.
- [YAML to XML](https://tooldeck.top/en/yaml/to-xml): Convert YAML to XML format with custom root tag.

## Base64 Tools

- [Base64 Encode](https://tooldeck.top/en/base64/encode): Encode text or binary data to Base64 for use in data URIs, emails, or APIs. Supports standard and URL-safe Base64.
- [Base64 Decode](https://tooldeck.top/en/base64/decode): Decode Base64 strings back to plain text. Handles standard and URL-safe Base64, auto-fixes missing padding.
- [Base64 Image Encoder](https://tooldeck.top/en/base64/image-encode): Convert any image (PNG, JPG, SVG, WebP) to a Base64 data URI for HTML, CSS, or emails.
- [Base64 Image Decoder](https://tooldeck.top/en/base64/image-decode): Decode Base64 data URIs back to viewable images and download them.
- [Base64 URL-safe](https://tooldeck.top/en/base64/url-safe): Encode and decode URL-safe Base64 (Base64url) using - and _ without padding — ideal for JWT and OAuth.
- [Base64 to Hex](https://tooldeck.top/en/base64/to-hex): Convert between Base64 and hexadecimal encoding bidirectionally.
- [Base64 File Encoder](https://tooldeck.top/en/base64/file-encode): Encode any file (PDF, ZIP, images, binaries) to Base64 via drag and drop.

## URL Tools

- [URL Encode](https://tooldeck.top/en/url/encode): Percent-encode query strings and URLs for safe HTTP transmission. Supports encodeURIComponent and encodeURI.
- [URL Decode](https://tooldeck.top/en/url/decode): Decode percent-encoded URLs and query strings. Handles %XX sequences and Unicode.
- [URL Parser](https://tooldeck.top/en/url/parser): Parse any URL into its components — protocol, host, path, query parameters, and hash fragment.

## JWT Tools

- [JWT Decoder](https://tooldeck.top/en/jwt/decoder): Decode JWT tokens and inspect header, payload, signature, and claims. No secret key required.
- [JWT Encoder](https://tooldeck.top/en/jwt/encoder): Create and sign JSON Web Tokens with HS256, HS384, or HS512 algorithms.

## UUID Tools

- [UUID v4 Generator](https://tooldeck.top/en/uuid/v4): Generate cryptographically random UUID v4. Uses crypto.randomUUID() — RFC 4122 / RFC 9562 compliant.
- [UUID v1 Generator](https://tooldeck.top/en/uuid/v1): Generate time-based UUID v1 with embedded 60-bit timestamp and node ID.
- [UUID v7 Generator](https://tooldeck.top/en/uuid/v7): Generate time-ordered UUID v7 for database primary keys. K-sortable, RFC 9562 compliant.
- [UUID v3 Generator](https://tooldeck.top/en/uuid/v3): Generate deterministic name-based UUID v3 using MD5 — same input always produces the same UUID.
- [UUID v2 Generator](https://tooldeck.top/en/uuid/v2): Generate DCE Security UUID v2 with embedded POSIX UID, GID, or Org local domain.
- [UUID Decoder](https://tooldeck.top/en/uuid/decoder): Decode and inspect UUID structure — detect version, variant, embedded timestamps for v1/v7.
- [ULID Generator](https://tooldeck.top/en/uuid/ulid): Generate lexicographically sortable unique IDs (ULID) — 26-char Crockford Base32, time-ordered.
- [NanoID Generator](https://tooldeck.top/en/uuid/nanoid): Generate tiny URL-safe unique IDs with customizable alphabet and size.
- [CUID Generator](https://tooldeck.top/en/uuid/cuid): Generate collision-resistant unique IDs (CUID v1) using timestamp, counter, and random data.
- [CUID2 Generator](https://tooldeck.top/en/uuid/cuid2): Generate secure next-generation CUID2 identifiers — cryptographically secure and opaque.

## Hash Tools

- [MD5 Hash Generator](https://tooldeck.top/en/hash/md5): Generate MD5 hash from any text. Supports uppercase and lowercase hex output.
- [SHA-1 Hash Generator](https://tooldeck.top/en/hash/sha1): Generate SHA-1 hash online. Note: SHA-1 is deprecated for security use; prefer SHA-256.
- [SHA-256 Hash Generator](https://tooldeck.top/en/hash/sha256): Generate SHA-256 hash using the Web Crypto API. The standard for secure hashing.
- [SHA-384 Hash Generator](https://tooldeck.top/en/hash/sha384): Generate SHA-384 hash — a SHA-2 variant producing a 384-bit digest.
- [SHA-512 Hash Generator](https://tooldeck.top/en/hash/sha512): Generate SHA-512 hash — maximum SHA-2 strength at 512 bits.
- [HMAC Generator](https://tooldeck.top/en/hash/hmac): Generate HMAC signatures with SHA-256, SHA-384, or SHA-512 using a secret key.
- [Hash Identifier](https://tooldeck.top/en/hash/identifier): Identify an unknown hash type by its length and character set — detects MD5, SHA-1, SHA-256, and more.

## CSV Tools

- [CSV to JSON](https://tooldeck.top/en/csv/to-json): Convert CSV to JSON array. Auto-detects headers and supports custom delimiters.
- [CSV to Markdown](https://tooldeck.top/en/csv/to-markdown): Convert CSV to a GitHub Flavored Markdown table with alignment support.
- [CSV to HTML Table](https://tooldeck.top/en/csv/to-html): Convert CSV to a valid HTML table with thead and tbody elements.
- [CSV Formatter](https://tooldeck.top/en/csv/formatter): Format and normalize CSV data — change delimiters, trim whitespace, normalize quoting.
- [CSV to SQL](https://tooldeck.top/en/csv/to-sql): Generate SQL INSERT statements from CSV data. Auto-generates CREATE TABLE and INSERT INTO.
- [CSV to XML](https://tooldeck.top/en/csv/to-xml): Convert CSV to XML — each row becomes an XML element with headers as tag names.
- [CSV to YAML](https://tooldeck.top/en/csv/to-yaml): Convert CSV to a YAML array of objects with headers as keys.

## Text Tools

- [Word Counter](https://tooldeck.top/en/text/word-counter): Count words, characters, sentences, and paragraphs. Estimate reading and speaking time.
- [Case Converter](https://tooldeck.top/en/text/case-converter): Convert text between uppercase, lowercase, title case, camelCase, PascalCase, snake_case, and kebab-case.
- [Lorem Ipsum Generator](https://tooldeck.top/en/text/lorem-ipsum): Generate lorem ipsum placeholder text by paragraphs, sentences, or word count.
- [Line Sorter](https://tooldeck.top/en/text/line-sorter): Sort lines alphabetically, by length, reverse, or randomize — six sort modes.
- [Duplicate Line Remover](https://tooldeck.top/en/text/duplicate-remover): Remove duplicate lines from text, keeping only unique lines. Case-insensitive option.
- [Text Diff](https://tooldeck.top/en/text/diff): Compare two text blocks and highlight every added, removed, and unchanged line.
- [Regex Tester](https://tooldeck.top/en/text/regex-tester): Test regular expressions and see matches highlighted with capture groups and positions.
- [Markdown Preview](https://tooldeck.top/en/text/markdown-preview): Preview Markdown rendered as HTML in real time. Supports headings, code blocks, and tables.
- [Password Generator](https://tooldeck.top/en/text/password-generator): Generate strong random passwords up to 128 characters with customizable character sets.
- [Slug Generator](https://tooldeck.top/en/text/slug-generator): Convert any text to a clean URL-friendly slug — handles accents, spaces, and Unicode.
- [String Escape](https://tooldeck.top/en/text/string-escape): Escape and unescape strings for JavaScript, Python, and JSON. Handles \n, \t, and unicode escapes.

## Color Tools

- [Color Converter](https://tooldeck.top/en/color/converter): Convert colors between HEX, RGB, HSL, and HSV formats with a visual color picker.
- [Color Contrast Checker](https://tooldeck.top/en/color/contrast-checker): Check WCAG AA and AAA contrast ratio between foreground and background colors.
- [Color Palette Generator](https://tooldeck.top/en/color/palette-generator): Generate complementary, analogous, triadic, and tetradic color palettes from any base color.
- [Color Name Finder](https://tooldeck.top/en/color/name-finder): Find the closest CSS named color for any HEX or RGB value.
- [CSS Gradient Generator](https://tooldeck.top/en/color/gradient-generator): Build linear and radial CSS gradients visually and copy the ready-to-use CSS code.
- [Tailwind Color Finder](https://tooldeck.top/en/color/tailwind-finder): Find the nearest Tailwind CSS color class (e.g. indigo-500) for any HEX or RGB value.

## XML Tools

- [XML Formatter](https://tooldeck.top/en/xml/formatter): Format and pretty-print XML with syntax highlighting. Validates on the fly.
- [XML Minifier](https://tooldeck.top/en/xml/minifier): Minify XML by removing whitespace and comments — reduces file size by 20–40%.
- [XML Validator](https://tooldeck.top/en/xml/validator): Validate XML syntax and check for well-formedness errors and unclosed tags.
- [XML to JSON](https://tooldeck.top/en/xml/to-json): Convert XML to JSON — handles attributes, nested elements, and arrays.
- [XML to YAML](https://tooldeck.top/en/xml/to-yaml): Convert XML to YAML format — handles attributes, nested elements, and arrays.
- [XPath Tester](https://tooldeck.top/en/xml/xpath-tester): Test XPath 1.0 expressions against XML and see all matching nodes highlighted.

## HTML Tools

- [HTML Formatter](https://tooldeck.top/en/html/formatter): Format and beautify HTML with proper indentation and configurable indent size.
- [HTML Minifier](https://tooldeck.top/en/html/minifier): Minify HTML by removing whitespace and comments to reduce file size.
- [HTML Escape / Unescape](https://tooldeck.top/en/html/escape): Escape and unescape HTML entities — converts & < > " and all named/numeric entities.
- [HTML to JSX](https://tooldeck.top/en/html/to-jsx): Convert HTML to JSX for React — transforms class→className, for→htmlFor, style strings→objects.
- [HTML to Markdown](https://tooldeck.top/en/html/to-markdown): Convert HTML to Markdown — handles headings, bold, italic, links, images, lists, and code blocks.

## CSS Tools

- [CSS Formatter](https://tooldeck.top/en/css/formatter): Format and beautify CSS with proper indentation and spacing.
- [CSS Minifier](https://tooldeck.top/en/css/minifier): Minify CSS by removing whitespace, comments, and redundant code.
- [CSS Unit Converter](https://tooldeck.top/en/css/unit-converter): Convert CSS units between px, rem, em, vw, vh, and % with a custom base font size.

## TOML Tools

- [TOML to JSON](https://tooldeck.top/en/toml/to-json): Convert TOML to JSON — handles all TOML data types, nested tables, and arrays.
- [TOML Formatter](https://tooldeck.top/en/toml/formatter): Format and validate TOML configuration files. Parse and re-serialize for clean output.

## Time Tools

- [Timestamp Converter](https://tooldeck.top/en/time/converter): Convert Unix timestamps (seconds or milliseconds) to human-readable dates and back to epoch.
- [Cron Expression Parser](https://tooldeck.top/en/time/cron-parser): Parse cron expressions into human-readable descriptions and preview the next 10 run times.
- [Cron Expression Generator](https://tooldeck.top/en/time/cron-generator): Build cron expressions visually with a step-by-step builder — get correct cron syntax instantly.
- [Cron Expression Validator](https://tooldeck.top/en/time/cron-validator): Validate cron expressions with field-by-field breakdown and error messages.
- [Date Calculator](https://tooldeck.top/en/time/date-calculator): Calculate the difference between two dates in years, months, days, hours, and minutes.
- [Timezone Converter](https://tooldeck.top/en/time/timezone-converter): Convert time between any IANA timezones. DST-aware, supports 400+ zones.

## Optional

- [About ToolDeck](https://tooldeck.top/en/about): About the ToolDeck project and privacy policy.
- [Sitemap](https://tooldeck.top/sitemap.xml): Full site index — all tools across all 23 supported languages.