Developer tools, zero friction.
Formatters, converters, visualizers and generators that run entirely in your browser. Your data never leaves your machine.
Formatters
10 toolsJSON Formatter
Format, validate and minify JSON instantly, with per-line error detection.
/tools/json-formatterCodePress
Beautify and minify HTML, CSS and JavaScript with configurable rules.
/tools/codepressQueryTidy
Turn long SQL statements into something readable, with clause highlighting.
/tools/querytidySVG Purifier
Strip scripts, event handlers and editor metadata from SVG markup, and shrink file size.
/tools/svg-purifierDNS Record Validator
Validate SPF, DKIM and DMARC TXT records with a plain-English breakdown.
/tools/dns-record-validatorText Formatter
Clean up messy pasted text — fix spacing, punctuation and capitalization instantly.
/tools/text-formatterLine Sorter & Deduplicator
Sort, deduplicate and clean up lists of text instantly.
/tools/line-sorterBulk String Replacer
Apply an ordered list of find-and-replace rules to your text in one pass.
/tools/bulk-string-replacerIndent Fixer
Detect mixed tabs and spaces, then normalize indentation to your target width.
/tools/indent-fixerMarkdown Syntax Checker
Paste Markdown and get broken links, header issues and malformed lists flagged by line number.
/tools/markdown-checkerConverters
14 toolsBase64 Switch
Encode and decode text, JSON or small files as Base64.
/tools/base64-switchUnixTime
Convert Unix timestamps to readable dates and back, with timezone support.
/tools/unixtimeColorShift
Convert colors between HEX, RGB, HSL and OKLCH with a live preview.
/tools/colorshiftChmod Master
Convert Linux permissions between octal, symbolic and a checkbox grid.
/tools/chmod-masterCSV JSON Matrix
Convert CSV to JSON and back, with full RFC 4180 quoted-field support.
/tools/csv-json-matrixXML JSON Transformer
Convert XML to JSON and back, with attributes and repeated tags handled correctly.
/tools/xml-json-transformerBase64 DataURI Bench
Check the exact Base64 overhead before inlining an image or font as a Data URI.
/tools/base64-datauri-benchYAML JSON Bridge
Convert YAML to JSON and back, with warnings for ambiguous yes/no/on/off words.
/tools/yaml-json-bridgeCurl To Code
Convert a raw curl command into fetch, Python requests, Axios or Go code.
/tools/curl-to-codeURL Forge
Recursively decode URLs, edit query parameters live, and build UTM tracking links.
/tools/url-forgeCase Converter
Convert identifiers between camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE.
/tools/case-converterSlug Forge
Turn any title or filename into a clean, URL- or filename-safe slug.
/tools/slug-forgeNumber Base Converter
Convert binary, octal, decimal and hex, build values bit by bit, and run bitwise operations at 8/16/32/64-bit widths.
/tools/base-shift.env ↔ JSON Converter
Convert a .env file to flat JSON and back, plus an optional YAML export.
/tools/env-bridgeVisualizers
13 toolsRegexLens
Test regular expressions with live-highlighted matches.
/tools/regexlensDiffScope
Compare two texts or files side by side and highlight every difference.
/tools/diffscopeTreeView JSON
Explore large JSON as a collapsible tree, with search by key.
/tools/treeview-jsonIP Subnet Calculator
Calculate network, broadcast and usable host range from any IPv4 CIDR.
/tools/ip-subnet-calculatorIPv6 Subnet Calculator
Calculate network prefix, address range and interface ID from any IPv6 CIDR.
/tools/ipv6-subnet-calculatorPassEntropy
Check password strength in real entropy bits, with NIST guidance.
/tools/pass-entropyContrastLens
Check color contrast against WCAG 2.2 ratios and the newer APCA model.
/tools/contrast-lensBudget Calc
Set a JS/CSS/image/font byte budget and see estimated download time per category.
/tools/budget-calcRegex Visualizer
See the structure of a regex pattern as a diagram — not just whether it matches.
/tools/regex-visualizerJSON Path Visualizer
Click any value in a JSON tree to get its JSONPath and JS bracket-notation path.
/tools/json-path-visualizerURL Validator
Paste a URL and see exactly how it parses per spec, with real-world problems flagged.
/tools/url-validatorSQL Query Visualizer
See a SQL SELECT statement's structure as a diagram — joins, WHERE/AND/OR grouping and subqueries.
/tools/sql-visualizerJSON Diff / Structural Compare
Compare two JSON documents key by key and see exactly what was added, removed or changed.
/tools/json-diff-lensGenerators
14 toolsJSON to Types
Generate TypeScript interfaces, Python TypedDict/dataclass or Go structs from a JSON example.
/tools/types-forgeEXIF Scrubber
View and losslessly strip EXIF, GPS and IPTC metadata from JPEG/PNG photos.
/tools/exif-scrubberTokenSmith
Decode and generate JWTs, with HMAC signature verification.
/tools/tokensmithUUID Forge
Generate UUID v4/v7 in bulk, ready to copy or export.
/tools/uuid-forgePixelQR
Generate customizable QR codes and download them as PNG or SVG.
/tools/pixelqrHMAC Generator
Sign any message with a secret key using HMAC-SHA256, 384 or 512.
/tools/hmac-generatorCryptoHash Studio
Generate SHA-256, SHA-384 and SHA-512 hashes from text or files instantly.
/tools/crypto-hash-studioCSS Grid Studio
Paint named grid areas visually and copy ready-to-use CSS Grid code.
/tools/css-grid-studioFluidType Calc
Generate a responsive clamp() font-size formula, or a full fluid type scale.
/tools/fluidtype-calcKeyframe Curve Lab
Design and preview CSS cubic-bezier() easing curves with a draggable editor.
/tools/keyframe-curve-labCronLens
Translate cron expressions to plain English and preview the next 10 run times.
/tools/cronlensBcrypt Argon2 Validator
Hash and verify passwords with bcrypt or Argon2id, with adjustable cost parameters.
/tools/bcrypt-argon2-validator.gitignore Generator
Pick your stacks and generate a combined, deduplicated .gitignore instantly.
/tools/gitignore-forgeFavicon & App Icon Generator
Generate a real favicon.ico, apple-touch-icon and Android Chrome icons from any image.
/tools/favicon-forge