High-Performance Online Tools Built for Speed.
Zero watermarks, zero installation. Process JSON, build CSS animations, model options payoffs, and optimize AI prompts directly in your browser.
Explore Tool Categories
Categorized utilities designed for client-side privacy, sub-millisecond execution, and high developer productivity.
Developer Tools
Visual animation builders, Wasm JSON validators, API mockers, and AST refactorers.
Content Creator Tools
Thumbnail previewers, code snippet animators, audio separators, and short video repurposers.
Analytics Tools
Derivatives payoff diagrams, UTM campaign builders, SaaS unit economics, and churn predictors.
Business Tools
PDF invoice generators, B2B lead scrapers, pricing simulators, and legal contract scanners.
Cybersecurity Tools
Protect your applications and data with advanced encryption generators, password entropy analysis, and AI prompt security simulators.
Productivity Tools
Time zone visualizers, Markdown studio, audio actionizers, and process builders.
SEO Tools
JSON-LD schema generators, SERP previewers, robots.txt inspectors, and link visualizers.
Privacy Tools
Browser-side PII scrubbers, EXIF strippers, local Wasm LLM clients, and key entropy analyzers.
AI Tools
Prompt optimizers, text humanizers, LLM cost calculators, and red-teaming security suites.
Image Tools
Compress, resize, crop, convert formats, and remove backgrounds securely in your browser.
PDF Tools
Merge, split, compress, extract text, and convert PDF documents with 100% local privacy.
Most Popular Tools
CSS Micro-Interaction & Animation Builder
Visual UI editor for generating pure CSS animations, progress bars, and geometric morphing effects.
JSON Formatter, Beautifier & Schema Validator
Format, validate, and convert massive JSON payloads up to 100MB directly in your browser via Wasm.
YouTube Thumbnail Analyzer & Previewer
Preview thumbnails and titles across YouTube desktop, mobile, and feed layouts in light and dark mode.
Position Sizing & Risk Management Calculator
Mathematically calculate the exact quantity of shares or lots to buy based on your strict risk limits.
Options & Derivatives Payoff Diagram Visualizer
Interactive P&L graph for multi-leg options strategies with real-time Greeks and IV crush modeling.
Professional PDF Invoice & Estimate Generator
Create, customize, and export professional watermark-free PDF invoices instantly.
SaaS Tier Pricing & Margin Simulator
Evaluate pricing models, server expenses, COGS, and gross margin profitability.
Robots.txt & Sitemap Health Inspector
Simulate search engine crawlers against your robots.txt rules and validate your XML sitemaps for structural SEO flaws.
Password & API Key Entropy Analyzer
Evaluate password strength, estimate GPU brute-force cracking time, and generate cryptographically secure API keys locally.
Web Crypto Hash & HMAC Suite
Generate highly secure cryptographic hashes, HMAC signatures, and SHA256SUMS file manifests locally in your browser.
Image Compressor
Reduce image file sizes locally in your browser. Compress JPG, PNG, and WebP without losing quality.
Merge PDF
Combine multiple PDF files into a single document instantly. Drag, drop, reorder, and merge.
Trending This Week
CSS Micro-Interaction & Animation Builder
Visual UI editor for generating pure CSS animations, progress bars, and geometric morphing effects.
JSON Formatter, Beautifier & Schema Validator
Format, validate, and convert massive JSON payloads up to 100MB directly in your browser via Wasm.
Cinematic Code Snippet Animator
Convert static code snippets into 4K 60fps animated typing videos for tutorials, Reels, and Shorts.
Options & Derivatives Payoff Diagram Visualizer
Interactive P&L graph for multi-leg options strategies with real-time Greeks and IV crush modeling.
Professional PDF Invoice & Estimate Generator
Create, customize, and export professional watermark-free PDF invoices instantly.
Meta Tags & Open Graph Generator
Generate optimized SEO meta tags and social sharing cards with real-time visual previews.
Robots.txt & Sitemap Health Inspector
Simulate search engine crawlers against your robots.txt rules and validate your XML sitemaps for structural SEO flaws.
Password & API Key Entropy Analyzer
Evaluate password strength, estimate GPU brute-force cracking time, and generate cryptographically secure API keys locally.
Local .env & Secret Token Scanner
Scan code, .env files, and Git diffs locally in your browser to detect leaked API keys, AWS credentials, and high-entropy secrets.
Image Compressor
Reduce image file sizes locally in your browser. Compress JPG, PNG, and WebP without losing quality.
Merge PDF
Combine multiple PDF files into a single document instantly. Drag, drop, reorder, and merge.
Recently Published
API Mock Server & Synthetic Data Generator
Design custom mock REST endpoints, simulate network latency and chaos testing, and export Express.js server scripts.
SaaS Tier Pricing & Margin Simulator
Evaluate pricing models, server expenses, COGS, and gross margin profitability.
Meta Tags & Open Graph Generator
Generate optimized SEO meta tags and social sharing cards with real-time visual previews.
World Clock & Time Zone Overlap Visualizer
Interactive timeline scrubber for scheduling across global distributed engineering teams.
Automated SOP & Process Builder
Generate formatted, printable Standard Operating Procedures (SOPs) and checklists from plain text descriptions.
Schema Markup (JSON-LD) Generator & Tester
Form builder for creating validated Google-compliant structured data for Articles, FAQs, Products, Organizations, and Local Businesses.
Programmatic SEO Content Cluster Architect
Generate complete hub-and-spoke SEO content strategies, including internal linking maps, URL structures, and search intent categorizations.
AI Internal Link Graph Visualizer
Map internal link connections on an interactive canvas node graph, isolate orphan pages, and evaluate internal PageRank flow.
Local WebAssembly LLM Chat
Run private, localized Language Models directly in your browser tab. Includes simulated local document RAG and WebGPU hardware monitoring.
Local .env & Secret Token Scanner
Scan code, .env files, and Git diffs locally in your browser to detect leaked API keys, AWS credentials, and high-entropy secrets.
Web Crypto Hash & HMAC Suite
Generate highly secure cryptographic hashes, HMAC signatures, and SHA256SUMS file manifests locally in your browser.
Engineered for Privacy & Speed
Why thousands of engineers and creators trust ToolLok Tools every day.
Sub-Millisecond Speed
Powered by WebAssembly for instant client-side computation.
Zero Data Retention
Your code and sensitive inputs never leave your local browser.
100% Mobile Ready
Fully responsive layouts optimized for touch devices and tablets.
Built for Speed & Privacy
See why thousands of developers, traders, and content creators rely on ToolLok daily.
"The client-side Wasm JSON formatter and PII Scrubber have become non-negotiable tools in my daily workflow. It's blistering fast."
Alex Rivera
Senior Full Stack Engineer at DevScale
"The Cinematic Code Snippet Animator allows me to turn plain code blocks into crisp 60fps video clips for YouTube Shorts in seconds."
Sarah Chen
Tech Content Creator at ToolLok Media
"Having instant access to clean options payoff diagrams and Greeks visualizers without bloated enterprise software is a game-changer."
Marcus Vance
Equity Derivatives Trader at Apex Capital