Free toolshg.studio/tools · 15 items · run in your browser
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15 free, browser-based tools for privacy, SEO, design and AI. No signup, nothing uploaded, and each one replaces ten to thirty minutes of doing it by hand.
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§01 Parts list15 items · run in your browser0 bytes uploadedThumbnails are drawn schematics of each tool, not screenshots.
All free tools
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t01Metadata Viewer
See hidden data in your photos and PDFs: GPS location, camera info, author details.
Privacy · ~15 min/tools/metadata-viewert02Password Generator
Generate strong, random passwords with customisable rules. Created locally, never sent anywhere.
Security · ~5 min/tools/password-generatort03Contrast Checker
Test colour combinations against WCAG accessibility standards in real time.
Design · ~10 min/tools/contrast-checkert04Robots.txt Generator
Build and validate a robots.txt file for search engine crawlers in seconds.
SEO · ~20 min/tools/robots-txt-generatort05AI Prompt Builder
Structure and refine prompts for ChatGPT, Claude, and other AI models.
AI · ~15 min/tools/ai-prompt-buildert06Metadata Stripper
Remove hidden data from your files before sharing. Keep your privacy.
Privacy · ~15 min/tools/metadata-strippert07Schema Generator
Create JSON-LD structured data for richer search results.
SEO · ~30 min/tools/schema-generatort08OG Preview
Preview how your links appear on social media before posting.
SEO · ~10 min/tools/og-previewt09Image Compressor
Reduce image file sizes without visible quality loss.
Design · ~10 min/tools/image-compressort10Speed Test
Audit page load performance and get actionable suggestions.
SEO · ~25 min/tools/speed-testt11Crack-Time Estimator
See how long a hacker would need to crack your password. Tested locally. It never leaves your browser.
Security · ~5 min/tools/password-crack-timet12PDF Toolkit
Merge PDFs or split one by page range, entirely in your browser. Files never leave your device.
Privacy · ~10 min/tools/pdf-toolkitt13Background Remover
Remove image backgrounds with on-device AI. Your photos never leave your browser.
AI · ~20 min/tools/background-removert14Security Headers Grader
Grade any site's HTTP security headers from A+ to F, with copy-paste fixes for nginx, Vercel, and Next.js.
Security · ~20 min/tools/security-headerst15Website Report Card
Grade any site's performance, security, SEO and social setup. One URL in, one letter grade out.
SEO · ~45 min/tools/website-report-card
Every tool runs on your device. Nothing is uploaded, and there is no account to make.Need one that doesn’t exist yet?
Free tools are the side projects. Custom software is the work.
HG Studio is a small founder-led software studio in London. Henry Goff leads every build; a bench of specialists joins as the scope demands. Websites, AI and data systems, automation, and shipped apps for UK businesses.
Free 30-minute callFixed price before the buildOr start your project in writing
Get the next tool first.
We publish a tool when one of our own builds throws off something worth giving away. One email per release; nothing else.