Kestrel Studio

Small, finished things that work without an account: tools that run in your browser, an audit that tells you what your site is getting wrong, and packs you buy once.

Free · no signupFree website auditPaste your URL into the checker. It scores the site against 15 fixed checks, shows the failing ones, and links a shareable report page.Get scored → DatasetAudit statisticsMean and median score, the full distribution, and the failure rate of every check across every site audited — with the raw CSV.See the numbers → ReferenceThe 16 checks, and how to fix eachWhat every audit check looks for, the command to see it on your own site, the config that fixes it, and the mistake that stops the fix from sticking.Read the fixes → 26 toolsBrowser tools (English)Image, JSON, hash, cron, regex, JWT, diff and more. Everything runs in your tab — no upload, no account, works offline.Open tools → 26 个工具浏览器工具（中文）图片压缩、JSON 格式化、哈希、cron 解释、正则测试、JWT 解码、文本对比等，全部本地运行，不传服务器，断网可用。打开工具 → StorefrontTemplates and packsSpreadsheet models, prompt libraries, design packs and site templates. Fixed price, instant download, no subscription.Browse packs → Paid tiersWebsite audit serviceThe free audit tells you what is broken. The paid report tells you, step by step, how to fix each one — plus a re-audit to prove it moved.See tiers →

What these have in common

Nothing here needs a login, and nothing you paste leaves your machine — the tools are static JavaScript, the audit is a script you can read, and the packs are files you download. If a number appears on this hub or in an audit report, the command that produced it is in the repository.