Simple tools, professional quality

Convert key measurement units in one screen.

Evaluate scientific expressions with function support and local history.

Parse LaTeX math expressions and plot 2D/3D graphs in browser.

Inspect public IP-related metadata.

Check if DNS requests leak outside expected routes.

Detect local/public IP exposure through WebRTC.

Validate certificate details and HTTPS setup.

Query domain registration ownership data.

Check domain availability for registration.

Inspect title, description, and Open Graph tags.

Validate sitemap XML structure and URLs.

Test crawl rules against user-agent paths.

Preview how your page can appear in search results.

Combine multiple PDF files into one document.

Reduce PDF file size for faster sharing.

Convert PDF content into editable DOCX.

Extract PDF pages as image files.

Create a PDF from multiple images.

Compress image size directly in your browser.

Convert between PNG, JPEG, and WebP.

Encode image files as Base64 and data URI strings.

Resize image dimensions with preview.

Add notes and highlights to images.

Generate a QR code image from text or URL.

Decode QR code content from an uploaded image.

Decode common barcode formats from an image.

Generate printable barcode images in multiple formats.

Format, minify, and validate JSON instantly.

Make SQL queries readable and consistent.

Test regular expressions with live matches.

Edit and preview multiple Mermaid charts on one screen. Unlike the official Mermaid editor, you can manage many charts in a single workspace.

Convert Unix timestamps, datetime inputs, and timezone-based times in one place.

Inspect and edit local binary files in a byte-level table.

Record and compare IME composition, beforeinput, input, and key event ordering across browsers.

Estimate monthly LLM API costs for chat, image, and video workloads.

Calculate MRR, fees, net profit, and break-even point for your micro SaaS.

Compare Workers, Pages, and R2 costs vs Vercel + Supabase and S3.