AI Search Schema Generator
Generate JSON-LD and schema markup optimized for AI-era search crawlers, including OpenAI Search, Perplexity, and Claude. Create WebApplication, FAQPage, and HowTo schemas.
Use tool🔒 Privacy FirstCode runs in your browser — zero data leaves your device.
⚡ No Login RequiredEvery tool works instantly. No sign-up, no accounts, no cookies.
📦 Free ForeverAll tools are completely free with no usage limits or paid tiers.
🌐 Works OfflineOnce loaded, most tools continue working without internet.
All Developer Tools
DPI Calculator
Calculate DPI and PPI for monitors, printers, and image files. Compare 4K, ultrawide, and print outputs with exact pixels-per-inch values for sharp displays.
Use toolAI Cost Simulator
Estimate LLM API costs across GPT-4, Claude, Gemini, and other models before you build. Compare prompt, completion, and monthly spend across providers.
Use toolCSV Streamliner
Clean CSV exports by removing empty rows, deduplicating records, normalizing headers, and preparing files for Excel, Google Sheets, and SQL database imports.
Use toolSafe Zone Generator
Calculate title-safe and action-safe margins for broadcast, print, social video, and motion graphics from resolutions and aspect ratios.
Use toolMarkdown Cleaner
Fix messy Markdown from Notion, Obsidian, Word, and Confluence. Normalize headings, spacing, links, and list syntax for portable documentation.
Use toolContainer Query Playground
Test CSS container queries visually. Inspect container-type, container-name, and cqw/cqh behavior with live resizing and copy-ready responsive CSS.
Use toolP2P File Share
Transfer files browser-to-browser with WebRTC. No server upload, no sign-up, direct encrypted chunked transfer between peers for large files.
Use toolSRT Splitter
Split and merge subtitle files by duration, cue count, or chapter markers. Export clean segmented SRT for clips, courses, and short-form video content.
Use toolSVG Animator
Animate SVG strokes, transforms, and CSS properties with a visual timeline. Export optimized CSS keyframes or inline animated SVG code for docs and dashboards.
Use toolSVG Shape Divider Generator
Create custom SVG wave, angle, curve, triangle, step, and tilt section dividers for modern landing pages. Visual editor with live preview and copy-ready code.
Use toolCron Expression Generator
Generate cron expressions visually with dropdown selectors and one-click presets. Real-time human-readable description for any cron schedule.
Use toolCSS Glassmorphism Generator
Create frosted glass and soft UI effects visually. Adjust blur, opacity, shadows, and border radius — copy ready-to-use CSS for any project.
Use toolFee Calculator
Calculate transaction fees for Stripe, PayPal, Etsy, and Shopify. Enter any amount to see the exact fee breakdown and what you receive — supports US, UK, Canada, and more.
Use toolRegex Builder
Build regular expressions visually with clickable tokens and cheat sheet. Test patterns against any text in real-time with match highlighting and plain-English explanations.
Use toolWhy UtilityLab?
UtilityLab was created to fill a gap in the developer tools ecosystem: useful, well-designed utilities that respect your privacy. Most free online tools upload your data to external servers, track your activity with cookies and analytics scripts, or limit what you can do behind paywalls. UtilityLab takes a different approach — every tool runs entirely in your browser using vanilla JavaScript. Your files, images, text, and settings never leave your device.
Our tools cover common developer and designer workflows that previously required installing desktop applications or trusting sketchy websites with sensitive data. From calculating DPI for print layouts to splitting subtitle files for video courses, each tool is built with a focus on speed, usability, and genuine utility rather than ad revenue or data collection.
The entire site is hosted on Cloudflare's global CDN with no backend servers, no databases, and no user accounts. When you close a tool tab, your session data is gone permanently. This architecture makes UtilityLab one of the few genuinely private alternatives in the free online tools space.
Frequently Asked Questions
Are these tools really free?
Yes. Every tool on UtilityLab is completely free to use. There are no paid tiers, no usage quotas, and no hidden charges. We are committed to keeping the platform free and accessible to everyone.
Do you store my data or uploaded files?
No. All tools run entirely client-side in your browser. No data, files, or inputs are transmitted to any server. Your session data is cleared when you close the tab.
Do I need to create an account?
No accounts, no sign-ups, no email required. Just open a tool and start using it immediately.