SEO, PDF & developer
tools in one place

Track rankings, break down a SERP, and generate the markup your pages need — plus the everyday converters, all running free in your browser.

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45

Tools

35

Free Tools

10

Pro Tools

10

Categories

Everything You Need

One toolkit, every workflow

MergeCombine multiple PDFs into oneSplitExtract pages or split by rangeCompressReduce file size, keep qualityRotateRotate pages 90°, 180°, 270°To ImageRender PDF pages as imagesFrom ImageBuild a PDF from imagesWatermarkStamp text across pagesSignDraw and embed a signatureCompressShrink images without visible lossResizeResize to exact dimensionsConvertPNG, JPG, WebP interchangeColor PickerPull colors out of an imageExtract TextRead text from images and scansJSON FormatFormat, validate and minify JSONBase64Encode and decode Base64CSV → JSONConvert tabular data to JSONMD → HTMLRender Markdown as clean HTMLQR CodeQR codes for links and textWord CountWords, characters, reading timeLorem TextPlaceholder copy generatorBroken LinksFind 404s across a pageRedirect CheckerTrace a redirect chainSSL / DNS / WHOISCertificate, records, registrationInternal LinksInternal link graph for a pageExternal LinksOutbound links and rel attributesImage SEOAlt text, sizes, formatsContent OptimizerScore a page against a keywordSearch IntentClassify intent behind a querySchema / JSON-LDStructured data for rich resultsMeta GeneratorTitle and description tagsRobots.txtCrawler rules builderSitemapXML sitemap from a URL listOpenGraph / TwitterSocial preview tagsQR / UTM BuilderCampaign URLs with a QR codeLLMs.txtGuidance file for AI crawlers

Pro Bundle

All 10 AI & live-search tools, $10/month

Chat PDF, Resume Scorer, Contract Review, Invoice Extractor, Summarizer, Entity Extraction, Rank Tracker, SERP Analysis, SERP Features, Competitor Intel.

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Why KR Tools

Built for speed & privacy

Instant Results

The converters and generators run entirely on your device — no upload, no queue, no waiting.

Private by Default

Nothing you paste is stored. Search tools pass the query straight through and hand the results back to your browser.

Works Everywhere

Nothing to install. Any modern browser on desktop, tablet or phone will do.