developer-tools

Reviewed Jan 1, 2000.

• tools: 77 tools scanned
• metadata: scanned

No findings.

Tools (77)

• json

  Format, minify, validate and convert JSON.. Operations: "format" — Pretty-print JSON with a configurable indent.; "minify" — Strip all insignificant whitespace from JSON.; "validate" — Check whether the input is valid JSON, reporting the error location.; "repair" — Best-effort repair of common JSON mistakes (trailing commas, single quotes, unquoted keys).. Call with "operation" plus "input" (and "options" where relevant).

• base64

  Encode and decode text in Base64, Base64URL, Base32, Base58, Base85 and hex.. Operations: "encode" — Encode text into the chosen format.; "decode" — Decode text from the chosen format back to plain text.. Call with "operation" plus "input" (and "options" where relevant).

• url

  Parse, validate and normalize URLs.. Operations: "parse" — Break a URL into its component parts.; "validate" — Validate a URL and run basic security/heuristic checks.; "normalize" — Normalize a URL (drop default ports, sort query params, strip trailing slash).. Call with "operation" plus "input" (and "options" where relevant).

• url-encode

  Percent-encode and decode URL strings.. Operations: "encode" — Percent-encode a string.; "decode" — Decode a percent-encoded string.. Call with "operation" plus "input" (and "options" where relevant).

• jwt

  Decode JWT header and payload (no signature verification).. Operations: "decode" — Decode a JWT into its header, payload and signature.. Call with "operation" plus "input" (and "options" where relevant).

• html-entity

  Encode and decode HTML entities (named, decimal, hex).. Operations: "encode" — Encode text into HTML entities.; "decode" — Decode HTML entities back to plain text.. Call with "operation" plus "input" (and "options" where relevant).

• hash

  Compute MD5, SHA-1/256/384/512, CRC32 and HMAC digests.. Operations: "hash" — Hash text with the chosen algorithm.; "hmac" — Compute an HMAC digest (SHA algorithms only).. Call with "operation" plus "input" (and "options" where relevant).

• uuid

  Generate and inspect UUIDs.. Operations: "v4" — Generate one or more random (v4) UUIDs.; "v3" — Generate a name-based (v3 / MD5) UUID.; "parse" — Parse a UUID and report its version, variant and (where present) timestamp.. Call with "operation" plus "input" (and "options" where relevant).

• password

  Generate strong random passwords and estimate their strength.. Operations: "generate" — Generate a cryptographically random password.; "strength" — Estimate the entropy and strength bucket of a password.. Call with "operation" plus "input" (and "options" where relevant).

• random

  Generate cryptographically secure random strings.. Operations: "generate" — Generate a secure random string from a chosen pattern.. Call with "operation" plus "input" (and "options" where relevant).

• case

  Convert text between camelCase, snake_case, kebab-case and more.. Operations: "convert" — Convert text to a single chosen case.; "all" — Return every supported case transform at once.. Call with "operation" plus "input" (and "options" where relevant).

• slugify

  Turn arbitrary text into a clean, URL-safe slug.. Operations: "slugify" — Generate a URL slug from text.. Call with "operation" plus "input" (and "options" where relevant).

• yaml-json

  Convert between YAML and JSON.. Operations: "yaml-to-json" — Convert YAML to JSON.; "json-to-yaml" — Convert JSON to YAML.. Call with "operation" plus "input" (and "options" where relevant).

• json-ts

  Generate TypeScript type declarations from a JSON sample.. Operations: "generate" — Infer TypeScript interfaces/types from JSON.. Call with "operation" plus "input" (and "options" where relevant).

• json-csv

  Convert between JSON and CSV.. Operations: "json-to-csv" — Convert a JSON array/object to CSV.; "csv-to-json" — Convert CSV to a JSON array.. Call with "operation" plus "input" (and "options" where relevant).

• color

  Convert colors between HEX, RGB, HSL, HSV and CMYK.. Operations: "convert" — Convert a HEX color to every supported color space.; "palette" — Generate a color harmony palette from a base color.. Call with "operation" plus "input" (and "options" where relevant).

• number-base

  Convert numbers between binary, octal, decimal and hex.. Operations: "convert" — Convert a number from one base to all supported bases.. Call with "operation" plus "input" (and "options" where relevant).

• chmod

  Convert between octal and symbolic Unix file permissions.. Operations: "octal-to-symbolic" — Convert octal permissions (e.g. "755") to a symbolic string and description.; "symbolic-to-octal" — Convert a symbolic permission string (e.g. "rwxr-xr-x") to octal.. Call with "operation" plus "input" (and "options" where relevant).

• http-status

  Look up and search HTTP status codes.. Operations: "lookup" — Look up a single status code by number.; "search" — Search status codes by number, name or description.. Call with "operation" plus "input" (and "options" where relevant).

• css-minify

  Minify or beautify CSS.. Operations: "minify" — Minify CSS (strip comments and whitespace).; "beautify" — Beautify CSS (one declaration per line, indented).. Call with "operation" plus "input" (and "options" where relevant).

• curl-converter

  Convert a curl command into fetch / Python / Node snippets.. Operations: "convert" — Parse a curl command and generate code snippets.. Call with "operation" plus "input" (and "options" where relevant).

• sql

  Format and minify SQL.. Operations: "beautify" — Beautify SQL with newlines before clauses.; "minify" — Minify SQL to a single line.. Call with "operation" plus "input" (and "options" where relevant).

• xml

  Pretty-print or minify already-serialized XML, and highlight it.. Operations: "format" — Pretty-print XML with the chosen indent (server-safe string transform).; "minify" — Collapse whitespace between XML tags (server-safe string transform).. Call with "operation" plus "input" (and "options" where relevant).

• html

  Format, minify and validate HTML.. Operations: "format" — Pretty-print HTML.; "minify" — Minify HTML (strip comments and collapse whitespace).; "validate" — Check HTML for unclosed/mismatched tags.. Call with "operation" plus "input" (and "options" where relevant).

• markdown

  Render Markdown to HTML, build a TOC and compute statistics.. Operations: "render" — Render GitHub-flavored Markdown to sanitized HTML.; "toc" — Extract a table of contents from Markdown headers.; "stats" — Compute document statistics for Markdown/plain text.. Call with "operation" plus "input" (and "options" where relevant).

• timestamp

  Convert and inspect Unix timestamps and dates.. Operations: "to-date" — Convert a Unix timestamp (seconds) to a full date breakdown.; "parse-date" — Auto-detect and parse a date/timestamp string.. Call with "operation" plus "input" (and "options" where relevant).

• cron

  Describe cron expressions and compute upcoming run times.. Operations: "describe" — Produce a human-readable description of a cron expression.; "next-runs" — Compute the next N run times for a cron expression.. Call with "operation" plus "input" (and "options" where relevant).

• regex

  Test a regex against a string and apply replacements.. Operations: "test" — Find all matches of a regex pattern in a test string.; "replace" — Replace regex matches in a string.. Call with "operation" plus "input" (and "options" where relevant).

• lorem

  Generate placeholder text in several styles.. Operations: "generate" — Generate lorem ipsum (or themed) placeholder text.. Call with "operation" plus "input" (and "options" where relevant).

• word-count

  Count words/characters and compute readability statistics.. Operations: "count" — Compute basic text statistics (words, characters, sentences, etc.).; "readability" — Compute readability scores (Flesch, SMOG, Coleman-Liau).; "keywords" — Compute keyword density for the text.. Call with "operation" plus "input" (and "options" where relevant).

• diff

  Compute a line-by-line diff between two texts.. Operations: "compare" — Diff two texts and return the lines plus statistics.; "unified" — Produce a unified-diff text between two inputs.. Call with "operation" plus "input" (and "options" where relevant).

• bcrypt

  Hash and verify passwords with bcrypt.. Operations: "hash" — Hash a password with bcrypt at the given cost.; "verify" — Verify a plaintext password against a bcrypt hash.. Call with "operation" plus "input" (and "options" where relevant).

• wifi-qr

  Build the standard WIFI: payload string for a WiFi QR code.. Operations: "payload" — Build the WIFI: payload string a phone scans to auto-join a network.. Call with "operation" plus "input" (and "options" where relevant).

• gitignore

  Generate a combined .gitignore from template keys.. Operations: "generate" — Combine one or more template keys into a .gitignore.; "templates" — List the available .gitignore template keys.. Call with "operation" plus "input" (and "options" where relevant).

• contrast

  Check WCAG contrast between a foreground and background color.. Operations: "check" — Compute the contrast ratio and WCAG pass/fail for a color pair.; "best-text" — Pick black or white text for the best contrast on a background.. Call with "operation" plus "input" (and "options" where relevant).

• image-base64

  Build and parse base64 data URIs and embed snippets.. Operations: "build-snippets" — Build HTML/CSS/Markdown snippets from an existing data URI.. Call with "operation" plus "input" (and "options" where relevant).

• json-schema

  Infer a draft-07 JSON Schema from sample JSON.. Operations: "generate" — Infer a draft-07 JSON Schema from sample JSON. Call with "operation" plus "input" (and "options" where relevant).

• cidr

  Parse a CIDR block into its network, broadcast and host range.. Operations: "calculate" — Calculate the network, broadcast, mask and host range for a CIDR block.. Call with "operation" plus "input" (and "options" where relevant).

• user-agent

  Parse a User-Agent string into browser, engine, OS and device.. Operations: "parse" — Parse a User-Agent string into browser, engine, OS and device details.. Call with "operation" plus "input" (and "options" where relevant).

• color-palette

  Generate harmony, shade and tint palettes from a base HEX color.. Operations: "generate" — Generate harmony, shade and tint palettes from a base HEX color.. Call with "operation" plus "input" (and "options" where relevant).

• password-strength

  Analyze a password and estimate its entropy, strength and crack time.. Operations: "analyze" — Analyze a password and estimate its entropy, strength and crack time.. Call with "operation" plus "input" (and "options" where relevant).

• jsonpath

  Query a JSON document with a JSONPath expression.. Operations: "query" — Evaluate a JSONPath expression against a JSON document.. Call with "operation" plus "input" (and "options" where relevant).

• totp

  Generate a time-based one-time password (TOTP) from a base32 secret.. Operations: "generate" — Generate the current TOTP code for a base32 secret.. Call with "operation" plus "input" (and "options" where relevant).

• data-size

  Parse a data size and convert it to bytes plus decimal and binary units.. Operations: "convert" — Parse a data size and convert it to bytes, decimal and binary units.. Call with "operation" plus "input" (and "options" where relevant).

• mime

  Look up MIME types by file extension or MIME type.. Operations: "lookup" — Search MIME types by extension or MIME type.. Call with "operation" plus "input" (and "options" where relevant).

• sort-lines

  Sort, reverse, deduplicate and clean up lines of text.. Operations: "process" — Sort, deduplicate and clean lines of text.. Call with "operation" plus "input" (and "options" where relevant).

• jwt-encode

  Sign a JSON payload into a JWT with an HMAC secret.. Operations: "sign" — Sign a JSON payload into a JWT using an HMAC secret.. Call with "operation" plus "input" (and "options" where relevant).

• ulid

  Generate a lexicographically sortable ULID.. Operations: "generate" — Generate a new ULID.. Call with "operation" plus "input" (and "options" where relevant).

• string-escape

  Escape and unescape strings for JSON, JS, HTML, URL and regex.. Operations: "escape" — Escape a string for the chosen context.; "unescape" — Unescape a string from the chosen context.. Call with "operation" plus "input" (and "options" where relevant).

• ascii

  Convert text to and from character codes in several bases.. Operations: "to-codes" — Convert text to character codes.; "from-codes" — Convert character codes back to text.. Call with "operation" plus "input" (and "options" where relevant).

• roman-numeral

  Convert between integers and Roman numerals.. Operations: "to-roman" — Convert an integer to a Roman numeral.; "from-roman" — Convert a Roman numeral to an integer.. Call with "operation" plus "input" (and "options" where relevant).

• aes-encrypt

  Encrypt and decrypt text with AES-GCM using a password.. Operations: "encrypt" — Encrypt plaintext into base64 ciphertext with a password.; "decrypt" — Decrypt base64 ciphertext produced by the encrypt operation.. Call with "operation" plus "input" (and "options" where relevant).

• json-diff

  Compare two JSON documents and report added, removed and changed values.. Operations: "diff" — Diff two JSON documents by path.. Call with "operation" plus "input" (and "options" where relevant).

• morse-code

  Translate text to and from Morse code.. Operations: "encode" — Convert text to Morse code.; "decode" — Convert Morse code to text.. Call with "operation" plus "input" (and "options" where relevant).

• markdown-table

  Convert CSV or TSV rows into a Markdown table.. Operations: "generate" — Build a Markdown table from delimited rows.. Call with "operation" plus "input" (and "options" where relevant).

• hmac

  Sign a message with HMAC using a secret key and SHA-2 algorithm.. Operations: "sign" — Compute an HMAC signature for a message.. Call with "operation" plus "input" (and "options" where relevant).

• css-units

  Convert a numeric value between CSS units (px, rem, em, pt, pc, %).. Operations: "convert" — Convert a numeric value from one CSS unit to another.. Call with "operation" plus "input" (and "options" where relevant).

• json-xml

  Convert between JSON and XML.. Operations: "to-xml" — Convert JSON to XML.; "to-json" — Convert XML to JSON.. Call with "operation" plus "input" (and "options" where relevant).

• char-inspector

  Break a string into per-character Unicode details.. Operations: "inspect" — Inspect each character of a string (code point, category, bytes).. Call with "operation" plus "input" (and "options" where relevant).

• semver

  Parse, compare, sort and bump Semantic Versions, and test versions against npm-style ranges.. Operations: "parse" — Parse a SemVer 2.0.0 version into its components.; "compare" — Compare two versions by SemVer precedence (-1, 0 or 1).; "satisfies" — Test whether a version satisfies a range (^, ~, x, hyphen, ||).; "max-satisfying" — Find the highest and lowest versions in a list that satisfy a range.; "explain-range" — Desugar a range into plain comparators (e.g. ^1.2.3 → >=1.2.3 <2.0.0-0).; "sort" — Sort versions by SemVer precedence; invalid entries are listed separately.; "bump" — Increment a version like `npm version <release>`.. Call with "operation" plus "input" (and "options" where relevant).

• duration

  Convert between ISO 8601 durations, seconds, clock time and human text like "1h30m" or "90 minutes".. Operations: "convert" — Parse any duration (ISO 8601, 1h30m, 90 minutes, 1:30:00, seconds) into every representation.; "to-iso" — Convert any duration to a canonical ISO 8601 duration string.; "humanize" — Render a duration as words ("1 hour 30 minutes") or compact text ("1h 30m").. Call with "operation" plus "input" (and "options" where relevant).

• nanoid

  Generate NanoIDs or custom-alphabet random IDs with crypto randomness, plus a collision-probability estimate.. Operations: "generate" — Generate one or more random IDs (default: 21-char URL-safe NanoID).; "collision" — Estimate how long until a 1% collision chance for an alphabet size, ID length and rate.. Call with "operation" plus "input" (and "options" where relevant).

• base-n

  Encode and decode UTF-8 text as Base32 (RFC 4648 + hex), Crockford Base32, Base58 (Bitcoin), Ascii85 or Z85.. Operations: "encode" — Encode UTF-8 text in the chosen scheme.; "decode" — Decode to UTF-8 text (binary payloads are returned as hex).. Call with "operation" plus "input" (and "options" where relevant).

• luhn

  Validate check digits: Luhn card numbers (with brand), IBAN mod-97, ISBN-10/13 and EAN/UPC barcodes. Format only — nothing is looked up or stored.. Operations: "validate" — Validate a number, auto-detecting its type or using the one you choose.; "check-digit" — Compute the Luhn or GS1 (EAN/UPC) check digit to append to a payload.. Call with "operation" plus "input" (and "options" where relevant).

• x509

  Decode PEM/DER X.509 certificates: subject, issuer, validity, SANs, key type/size, signature algorithm, extensions and fingerprints.. Operations: "decode" — Decode every certificate in a PEM bundle (or one bare base64 DER).. Call with "operation" plus "input" (and "options" where relevant).

• env-json

  Convert dotenv files to JSON and back, with dotenv-compatible quoting, escapes, comments, export prefixes and multi-line values, plus validation warnings.. Operations: "to-json" — Parse a .env file into a JSON object (last duplicate wins).; "to-env" — Write a JSON object as .env lines, quoting values only where needed.; "validate" — Lint a .env file: duplicates, invalid names, unterminated quotes, stray # comments.. Call with "operation" plus "input" (and "options" where relevant).

• toml-json

  Convert TOML 1.0 to JSON and JSON to TOML, reporting anything that cannot round-trip.. Operations: "to-json" — Parse TOML and return pretty-printed JSON.; "to-toml" — Convert a JSON object to TOML (nulls are dropped with a warning).. Call with "operation" plus "input" (and "options" where relevant).

• csp

  Parse a Content-Security-Policy, explain each directive and flag weaknesses (unsafe-inline, wildcards, missing object-src/base-uri/frame-ancestors…).. Operations: "evaluate" — Parse a CSP header and return its directives and findings by severity.; "harden" — Add the low-risk directives a policy is missing (object-src 'none', base-uri, frame-ancestors, form-action) and return ready-to-paste header, meta, nginx and Apache forms.. Call with "operation" plus "input" (and "options" where relevant).

• security-headers

  Grade pasted HTTP response headers (HSTS, CSP, nosniff, framing, Referrer-Policy, Permissions-Policy, COOP/COEP/CORP, cookies) A+ to F. Parses text only; never fetches a URL.. Operations: "grade" — Grade a raw header block and explain each check.. Call with "operation" plus "input" (and "options" where relevant).

• ipv6

  Expand and compress IPv6 addresses (RFC 5952), classify them (link-local, ULA, multicast, documentation…), extract embedded IPv4, do prefix and range maths, and build ip6.arpa names.. Operations: "analyze" — Analyse an address, prefix or range: canonical and expanded forms, type, embedded IPv4, network bounds, reverse DNS.; "compress" — Rewrite each address in its RFC 5952 canonical (shortest) form.; "expand" — Rewrite each address with all eight 4-digit groups.. Call with "operation" plus "input" (and "options" where relevant).

• utm

  Build campaign URLs with utm_* parameters, parse and lint tagged links, and strip UTM and click-ID tracking parameters.. Operations: "build" — Add UTM parameters to a URL, normalising case and spaces, and lint the result.; "parse" — Split a URL into UTM tags, ad click IDs and other parameters, with warnings.; "strip" — Remove utm_* and click-ID parameters (gclid, fbclid, msclkid…) from a URL.; "batch" — Tag many URLs (one per line) with the same UTM parameters.. Call with "operation" plus "input" (and "options" where relevant).

• aspect-ratio

  Reduce a ratio or resolution to lowest terms, name the nearest common ratio, solve the missing dimension and write CSS aspect-ratio.. Operations: "analyze" — Reduce a ratio or size (16:9, 1920x1080, 2.39) and return presets, CSS and whole-pixel sizes.; "solve" — Given a ratio and one dimension, compute the other.; "fit" — Largest size at this ratio that fits inside (contain) or covers (cover) a box.. Call with "operation" plus "input" (and "options" where relevant).

• html-jsx

  Convert HTML or SVG markup to React JSX: className/htmlFor, camelCased SVG attributes, style objects, self-closing tags, JSX comments.. Operations: "convert" — Convert an HTML fragment or document to JSX, with warnings for anything to review.. Call with "operation" plus "input" (and "options" where relevant).

• jsonc

  Convert JSON5, JSONC (tsconfig, VS Code settings) and relaxed JSON to strict JSON, or reformat them with comments kept, reporting every non-JSON feature used.. Operations: "to-json" — Convert JSON5 / JSONC to strict RFC 8259 JSON.; "format" — Re-print JSON / JSON5 / JSONC tidily as JSONC or JSON5, keeping comments.; "validate" — Check whether text is valid JSON5 and list which non-JSON features it uses.. Call with "operation" plus "input" (and "options" where relevant).

• text-cleanup

  Find and remove invisible Unicode (zero-width, bidi/Trojan Source, tag-character smuggling), fix line endings, trailing whitespace, tabs and smart quotes, and normalise Unicode.. Operations: "scan" — Report invisible and special characters, hidden tag-character text, unterminated bidi controls, line endings and normalisation.; "clean" — Apply clean-ups and return the text plus counts of every change.. Call with "operation" plus "input" (and "options" where relevant).

• date-calc

  Days, months and business days between dates, add or subtract durations, ISO week numbers and day of year, and DST-aware elapsed time between local times.. Operations: "diff" — Difference between two dates in years/months/days, total days, weeks and business days.; "add" — Add or subtract a duration ("1y 2m", "-90d", "P2W") or a number of business days.; "info" — Weekday, day of year, ISO week, quarter and leap year for a date (plus Unix time of local midnight).; "elapsed" — Exact elapsed time between two local date-times, following DST in each time zone.. Call with "operation" plus "input" (and "options" where relevant).

• svg-data-uri

  Minify an SVG and encode it as a compact percent-encoded (or base64) data URI, with background-image and mask-image CSS.. Operations: "encode" — Optimise an SVG and return url-encoded and base64 data URIs, sizes and CSS snippets.; "decode" — Decode a data:image/svg+xml URI (percent-encoded or base64) back to SVG markup.. Call with "operation" plus "input" (and "options" where relevant).