Fast, Private & Free Online Utilities
100% client-side PDF, image, text, and developer tools. Zero server compute, zero latency, absolute privacy.
JSON Formatter & Validator
Format, validate, beautify, and minify JSON data instantly with real-time error detection. 100% private in-browser tool.
Base64, Hash & JWT Inspector
Encode & decode Base64 (Unicode safe), generate SHA-256/SHA-512 hashes, and inspect JWT tokens in-browser. 100% private.
GeoJSON ⇄ TopoJSON & GIS Converter
Convert between KML, GPX, CSV, TopoJSON, and GeoJSON with instant spatial validation. 100% in-browser.
Online SQL Formatter & Beautifier
Format, beautify, and minify PostgreSQL, MySQL, SQLite, Oracle, and T-SQL queries. 100% in-browser.
Online JWT Debugger & Token Decoder
Decode, inspect, and verify JSON Web Tokens (JWT) with live expiration countdown. 100% in-browser.
CSS Box Shadow & Glassmorphism Generator
Create multi-layer CSS box shadows and frosted glass effects with instant Tailwind CSS code. 100% in-browser.
Online HTML / CSS Minifier & Beautifier
Minify and beautify HTML and inline CSS with instant compression savings calculator. 100% in-browser.
URL Encoder / Decoder & Query Param Builder
Encode, decode, parse URLs and build query parameters interactively. 100% in-browser privacy.
SVG to CSS Data URI & Background Generator
Convert SVG icons directly to CSS background-image and Tailwind CSS classes. 100% in-browser.
Brotli, Gzip & Deflate Compression Benchmark
Simulate & compare network transfer sizes across Gzip, Brotli, and Deflate algorithms. 100% in-browser.
CSV to Excel (.xlsx) Converter & Data Grid
Convert CSV, TSV, and delimited text files to native Excel (.xlsx) format. 100% in-browser.
WCAG 2.1 Color Contrast Checker & Accessibility
Calculate color contrast ratios and test compliance with WCAG AA and AAA standards. 100% in-browser.
Cryptographic Hash Generator & File Checksum Verifier
Generate SHA-256, SHA-512, SHA-384, SHA-1, MD5, and CRC32 hashes. 100% in-browser.
NanoID, ULID & API Token Generator Studio
Generate compact, URL-safe, and time-sortable unique IDs and API tokens. 100% in-browser.
SVG Optimizer & Vector Minifier Studio
Clean metadata, strip editor namespaces, and minify SVG vector file size. 100% in-browser.
HTML to JSX & React Component Converter
Convert HTML templates, Tailwind & Bootstrap snippets to clean React JSX/TSX. 100% in-browser.
CSS Clamp & Fluid Typography Calculator
Calculate responsive CSS clamp() values for fluid typography and spacing without media queries. 100% in-browser.
JSON to TOML & TOML to JSON Converter Studio
Bidirectionally convert JSON and TOML configuration files (Cargo, pyproject, Go). 100% in-browser.
JSON to SQL Schema & INSERT Generator Studio
Convert JSON arrays into CREATE TABLE schemas and INSERT queries for PostgreSQL, MySQL & SQLite. 100% in-browser.
JWT Token Generator & HMAC Signer Studio
Sign and generate valid JWT authentication tokens using HS256, HS384, and HS512. 100% in-browser.
JWT Signature Verifier & Token Validator
Cryptographically verify HS256, HS384, and HS512 JWT signatures and expiration. 100% in-browser.
CSS Keyframe Animation & Easing Studio
Create custom CSS @keyframes animations with live preview, timing easing, and Tailwind export. 100% in-browser.
CSS Mesh Gradient & Fluid Aurora Studio
Create multi-point radial mesh gradients, fluid aurora wallpapers, and export pure CSS or PNG. 100% in-browser.
YAML to TOML & TOML to YAML Converter Studio
Bidirectionally convert Kubernetes/Docker YAML and Rust/Python TOML configuration files. 100% in-browser.
Multi-Stage Dockerfile & Compose Generator
Generate optimized multi-stage Dockerfiles and compose configs for Next.js, Node, Python, Go, and Rust. 100% in-browser.
Markdown to HTML Converter & Live Editor
Convert Markdown to clean HTML with real-time synchronized preview & standalone export. 100% in-browser.
Regular Expression (Regex) Tester & Debugger
Test, evaluate, and debug regular expressions with live match highlighting & cheat sheet. 100% in-browser.
CSV ⇄ JSON Converter & Data Table Viewer
Convert CSV, TSV, and JSON bidirectionally with live interactive spreadsheet table preview. 100% in-browser.
HTML Entity Encoder & Decoder Studio
Convert special characters to named, decimal, or hex HTML entities and decode back to text. 100% in-browser.
Visual Cron Schedule & Expression Generator
Build, translate, and verify crontab schedules with human-readable summary & next execution times. 100% in-browser.
Universal Color Converter & Contrast Checker
Convert HEX, RGB, RGBA, HSL, HSV, and CMYK colors with live WCAG 2.1 contrast accessibility score. 100% in-browser.
CSS Gradient Generator Studio
Create beautiful linear, radial, and conic CSS gradients with multi-stop controls & 1-click code export. 100% in-browser.
URL Slug & Clean Permalink Generator
Convert article titles to clean SEO-friendly URL slugs, kebab-case, and snake-case with multi-language transliteration. 100% in-browser.
JSON to TypeScript & Zod Schema Converter
Convert raw JSON into strongly-typed TypeScript interfaces, types, and Zod validation schemas. 100% in-browser.
Number Base Converter (Binary, Hex, Decimal, Octal)
Convert numbers synchronously between Binary, Hexadecimal, Decimal, Octal, and ASCII with memory bit padding. 100% in-browser.
Markdown & HTML Table Generator Studio
Build, edit, and export GitHub-Flavored Markdown, HTML, CSV, and JSON tables with interactive spreadsheet matrix. 100% in-browser.
CSS Clip-Path Shape Studio & Generator
Visually build custom CSS polygon clip-paths, geometric shapes, and coordinate vertices with live preview. 100% in-browser.
cURL to Code Converter (Fetch, Axios, Python, Go)
Instantly convert cURL command lines into JavaScript fetch, Axios, Python requests, Go, Node.js, and PHP code. 100% in-browser.
JSON ⇄ YAML Converter & Formatter Studio
Bidirectional JSON to YAML and YAML to JSON converter with customizable indentation and syntax validation. 100% in-browser.
User-Agent Parser & Device Inspector Studio
Decode browser User-Agent strings to detect Browser name & version, OS, Device type, CPU architecture, and Rendering Engine. 100% in-browser.
UUID / GUID & ULID Generator Studio
Generate cryptographically secure RFC 4122 UUID v4, time-ordered UUID v7, ULID, and short nano IDs in bulk. 100% in-browser.
HTML Table to CSV, JSON & TSV Converter
Parse HTML <table> markup and convert into Excel CSV, JSON objects, TSV, or Markdown tables. 100% in-browser.
CSS Glassmorphism & Frosted Glass Generator
Create modern frosted glass UI cards with live backdrop-filter, blur, opacity, borders, and shadows. 100% in-browser.
CSV & JSON to XML Converter Studio
Convert CSV tables and JSON datasets into well-formed XML documents with custom root/row tags and CDATA. 100% in-browser.
CSV to SQL INSERT Statement Converter
Convert CSV spreadsheets into MySQL, PostgreSQL, SQLite, and MS SQL INSERT statements with auto data-type detection. 100% in-browser.
Cryptographic Random String & Token Generator
Generate cryptographically secure random strings, API secret keys, hex tokens, and PIN codes. 100% in-browser.
Hex ⇄ ASCII & UTF-8 Text Converter
Convert hexadecimal strings to plain text (ASCII/UTF-8) and text to hex format with byte inspection. 100% in-browser.
Binary ⇄ Hexadecimal (Hex) Converter
Convert binary bits to hexadecimal strings and hex to binary bytes with live byte matrix inspection. 100% in-browser.
Markdown Task List & Checklist Generator
Visually build GitHub-flavored Markdown task lists (- [ ] and - [x]) with progress tracking and subtask indentation. 100% in-browser.
XML to JSON Converter
Parse XML documents, RSS feeds, and SOAP payloads into structured JSON objects with custom attribute mapping. 100% in-browser.
Fancy CSS Border Radius & Blob Generator
Visually generate advanced 8-point fancy border-radius values, organic blobs, and fluid shapes with live CSS and Tailwind code. 100% in-browser.
Text ⇄ Binary Code Translator
Convert plain text to 8-bit binary code strings and decode binary bytes to readable text with UTF-8 character matrix. 100% in-browser.
SQL INSERT to JSON Converter
Parse SQL INSERT statements and database dumps into clean, structured JSON arrays with live data table preview. 100% in-browser.
Pure CSS Triangle & Arrow Generator
Visually generate pure CSS triangles and arrows for tooltips, popovers, dropdowns, and speech bubbles in 8 directions. 100% in-browser.
Visual JSON Diff & Compare Tool
Deeply compare two JSON objects to visually highlight added, removed, and modified keys with summary stats. 100% in-browser.
ROT13 & Caesar Cipher Encoder / Decoder
Encode and decode text using ROT13, ROT47, Atbash, and custom Caesar ciphers with live alphabet mapping visualizer. 100% in-browser.
SEO Meta Tag & Open Graph Generator
Generate complete HTML meta tags, Open Graph properties, and Twitter Cards with live Google and social media previews. 100% in-browser.
Linux & Unix Chmod Permissions Calculator
Visually calculate Linux/Unix file and directory permissions in octal (755, 644, 777), symbolic notation, and ready-to-use chmod commands. 100% in-browser.
Credit Card & Luhn Algorithm Validator
Validate credit and debit card number formats, detect card network (Visa, Mastercard, Amex, Troy), and verify Luhn Mod 10 checksum. 100% in-browser.
CSS Cursor Style Tester & Generator
Explore and test 30+ standard CSS cursor styles live, create custom emoji/SVG cursors, and export CSS or Tailwind utility classes. 100% in-browser.
IPv4 Subnet & CIDR Calculator
Calculate Subnet Mask, Network ID, Broadcast IP, Wildcard, usable host range, and 32-bit binary notation live in-browser. 100% private.
HTML to Markdown Converter
Convert raw HTML code, rich snippets, and blog posts into clean GitHub Flavored Markdown (GFM) with live preview. 100% in-browser.
Why Choose HerBokolog?
Engineered with modern web standards for maximum speed and privacy.
Uncompromising Privacy
Unlike traditional sites, your confidential documents, photos, and secrets never leave your device.
Instant Local Speed
Powered by WebAssembly, Web Workers, and Canvas API. Zero upload wait queues or remote server latency.
No Artificial Limits
Enjoy unrestricted usage without paywalls, countdown timers, or forced email registrations.