Developer tools, zero friction.
Formatters, converters, visualizers and generators that run entirely in your browser. Your data never leaves your machine.
Formatters
5 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-validatorConverters
10 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-forgeVisualizers
7 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-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-calcGenerators
10 toolsTokenSmith
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