07_ DEV_TOOLS
Small, single-purpose utilities I kept re-googling, rebuilt properly and put in one place. Every one of them runs entirely in your browser — nothing you paste is uploaded, logged or sent to a server. No accounts, no adverts, no limits.
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differenceText01
Text Diff Checker
Compare two blocks of text line by line.
DiffCompareLCS
Open tool arrow_forwardswap_horizEncoding02
Base64 Encoder / Decoder
Convert text and files to and from Base64.
Base64UTF-8Data URI
Open tool arrow_forwarddata_objectData03
JSON Formatter & Validator
Pretty-print, minify and validate JSON.
JSONValidateFormat
Open tool arrow_forwardlinkWeb04
URL Encoder & Decoder
Percent-encode URLs and break them apart.
URIPercent-encodingQuery
Open tool arrow_forwardcampaignWeb05
UTM URL Builder
Build tagged campaign links that track properly.
UTMAnalyticsCampaigns
Open tool arrow_forwardqr_code_2Media06
QR Code Generator
Turn any text, link or Wi-Fi network into a QR code.
QRPNGSVG
Open tool arrow_forwardkeySecurity07
JWT Decoder
Inspect the header, payload and claims of a JSON Web Token.
JWTClaimsAuth
Open tool arrow_forwardfind_replaceText08
Regex Tester
Test a regular expression against real text, live.
RegExpMatchGroups
Open tool arrow_forwardcompressWeb09
CSS & HTML Minifier / Beautifier
Squash or expand CSS and HTML.
CSSHTMLMinify
Open tool arrow_forwardshapesMedia10
SVG Optimizer
Strip the cruft that design tools leave in SVG files.
SVGOptimizeVector
Open tool arrow_forward