ZeonTools
Free Utilities &
Tools
Browse our comprehensive suite of developer and creator tools. 100% client-side privacy, instant results, and no uploads required.
Web Development & DevOps
Offline JWT Token Decoder
Decode JSON Web Tokens entirely in your browser — no server upload. Inspect header, payload, and expiry safely.
Regex Live Visual Flowcharter
Input any regular expression. The parser builds an interactive SVG flowchart showing each capture group step-by-step.
Offline JSON Schema Scaffold Builder
Drop structural API payload models to generate rigid JSON validation schema specs instantly without server telemetry.
Webhook Payload Retries & Backoff Simulator
Graph and output custom retry curves with variable jitter components to protect microservice APIs from crashing.
Multi-Region Cron Job Timezone Visualizer
Map backend cron expression execution schedules across concurrent global timezones to prevent daylight saving time collision failures.
Visual CSP Header Builder & Auditor
Construct robust Content Security Policy headers visually to prevent XSS attacks without breaking external API integrations.
Core Web Vitals INP Debugger & Main Thread Auditor
Parse specific frontend layout JavaScript blocks to flag blocking event handlers that trigger bad Interaction to Next Paint scores.
Apple Wallet & Google Pass Visual Code Architect
Draft native smartphone wallet card layouts visually to instantly export clean, compliant JSON manifest configurations.
WebAssembly (Wasm) Linear Memory Page Allocator
Optimize low-level 64KB web memory page allocations to eliminate runtime heap overflow crashes.
Design & UI/UX
Vertical Video Frame Overlay
Drop an MP4 locally. Overlay an adjustable 9:16 crop frame over live playback to preview vertical reformat positioning.
WCAG Color Contrast Checker
Scan image mockups for text contrast ratios and apply real-time color blindness simulation filters (Deuteranopia, Protanopia).
Palette Contrast Heatmapper
Enter 5 brand hex colors. Get a full cross-reference grid of every text/background pairing with WCAG pass/fail scores.
Favicon Multi-Preview Workspace
Upload an icon to preview it across Chrome tabs, Safari dark mode, Windows taskbar, and phone home screens simultaneously.
CSS Fluid Typography Scale
Design responsive type scales with fluid clamp() values. Preview live across mobile, tablet, and desktop viewports.
CSS Flexbox & Grid Scaffold Mixer
Drag child components inside a canvas. The code engine generates minimal, clean flexbox or grid CSS in real time.
Interactive CSS Shadow Blender
Apply stacked, ultra-smooth CSS shadow layers and output copy-paste code.
SVGO Vector Path Precision Optimizer
Clean and minify raw vector graphics files locally, stripping editor metadata bloat and rounding coordinate floating decimals.
CSS Glassmorphism & Noise Layer Blender
Build modern, realistic frosted glass interface components with live SVG noise texturing and copy-paste functional CSS rules.
OKLCH & P3 CSS Color Space Generator
Convert legacy HEX codes into modern, high-gamut OKLCH values to unlock ultra-vibrant, mathematically uniform UI color palettes.
SVG viewBox Coordinates & Path Rescaler
Recalculate internal vector path math to properly resize and normalize misaligned SVG viewBoxes without quality loss.
YouTube Thumbnail Squint Test & Accessibility Simulator
Apply native scaling, artificial blur layers, and color-blindness color filters to test visual thumbnail clickability.
CSS Native Scroll-Driven Animation Curve Playground
Visually manipulate structural element tracking windows to interpolate frame nodes into copy-paste scroll-timeline rules.
WebXR Passthrough Latency & Frame Pacing Performance Auditor
Map rendering loops, sensor-to-photon latency, and frame pacing budgets to keep WebXR experiences above 90 FPS.
Cybersecurity & OSINT
PII Document Anonymization Brush
Drop an image or screenshot. Paint black redaction bars over sensitive text and download a flattened, scrubbed version.
Unstructured Bank Statement Sanitizer
Format messy raw bank data rows into a clean, downloadable spreadsheet.
Tailwind CSS Arbitrary Value & Variant Builder
Construct highly complex, nested Tailwind CSS pseudo-class selector strings using a simple, visual dropdown interface.
OSINT Metadata Image Coordinates Cross-Referencer
Extract buried EXIF geographical metadata from media uploads to instantly trace coordinates on a secure canvas map.
Disposable Email & Burner Domain Risk Grader
Scan validation lists against string parameters to cross-reference and flag throwaway mailbox setups.
Zero-Knowledge Proof (ZKP) Validation Sandbox
Simulate cryptographic verification handshakes to authenticate user states without exposing private data.
NIST Post-Quantum Crypto (PQC) Key-Size & Packet Latency Simulator
Model packet fragmentation and network handshake slowdowns when migrating infrastructure to ML-KEM or ML-DSA.
AI & Machine Learning
LLM RAG Document Chunk & Overlap Visualizer
Paste text and adjust token parameters to visually map out exactly how your RAG embedding pipeline will split and overlap data.
AI-Safe Robots.txt Shield Generator
Instantly compile a clean security rule file specifically optimized to block emerging AI crawlers and scrapers from indexing content.
EU AI Act Classification & Risk Audit Matrix
Evaluate machine learning pipelines against global regulatory frameworks to instantly categorize system deployments into risk compliance tiers.
AI Agent Dialog & Latency Flow Visualizer
Map multi-turn conversational agent logic to identify API timeout vulnerabilities and recursive loops.
Algorithmic Bias & AI Compliance Auditor
Evaluate datasets against global AI transparency frameworks (like the EU AI Act) to generate risk matrices.
Synthetic Data Distribution & Bias Mapper
Cross-reference generative data outputs against baseline curves to isolate synthetic drift and data decay.
Business, Finance & E-Commerce
Sustainability & Clean Energy
Eco-Delivery & Corrugated Packaging Volume Reducer
Calculate spatial bounding matrices for physical items to optimize box volumes and limit shipping void space.
EU CSRD Carbon Accounting & Scope 3 Supply Chain Matrix
Evaluate downstream corporate supply chain logistics against EU CSRD transparency reporting mandates.
Productivity, Hardware & Utilities
Visual Timezone Overlap Slider
Add global cities to stacked 24-hour timelines. Drag a pin to find overlapping working hours across time zones.
ATS Resume Robot Simulator
Drop a resume PDF. A local text extractor strips formatting to show exactly how ATS recruitment scanners read your file.
Local Bulk Image Optimizer
Drop up to 50 images. A canvas pipeline compresses and resizes them to target dimensions and packages a local ZIP file.
LaTeX Equation Visual Renderer
Type raw LaTeX math expressions. MathJax renders polished vector equations live. Export as SVG or PNG instantly.
WebGPU Compute Pipeline Memory Visualizer
Allocate and debug compute shader buffer sizes to prevent silent WebGPU device crashes.