Mini Tools
A collection of lightweight, instant, and privacy-first web utilities. Format JSON, encode/decode Base64, and process text strings securely without server storage.
Available Utilities
API Tester
Local-first REST API Testing tool alternative to Postman. Features VS Code tabbed workspace, {{baseUrl}} environment variables, Body formatting, collapsible JSON tree, and 100% offline IndexedDB storage.
JSON Formatter & Minifier
Format, beautify, and validate JSON/JSON-LD, or minify size to optimize web load speeds.
XML Formatter & Converter
Beautify, format, minify, or convert XML to JSON and vice versa instantly.
Base64 Encode
Encode plain text or URL to Base64 format. Fully supports multi-byte UTF-8 without errors.
Base64 Decode
Decode Base64 strings back to plain text. Automatically handles UTF-8 characters.
Base64 to File
Convert Base64 or Data URI strings to binary files, automatically detect formats, and download.
File to Base64
Convert images, documents, or any file into Base64 or Data URI strings securely.
SQL Formatter & Beautifier
Format, beautify, and align SQL queries, and toggle keyword casing instantly.
Text Compare & Diff Tool
Compare differences between two texts in Side-by-Side or Inline view mode.
Case Converter
Convert text cases to various naming conventions (camel, snake, Pascal) in real-time.
UUID Generator
Generate bulk UUIDs from v1 to v7 with hyphens and casing options.
JWT Debugger
Decode, encode, and verify JSON Web Tokens (JWT) in real-time. Supports HS256/384/512, RS256/384/512, and ES256.
QR Code Generator
Generate stylish QR codes with custom logo, colors and dot styles. Download high-quality PNG & SVG. Works fully offline.
HTML Encoder & Decoder
Encode special characters into safe HTML entities or decode them back instantly. Helps avoid rendering issues and prevent XSS.
Regex Tester & Debugger
Test, validate, and debug JavaScript Regular Expressions in real-time. Features capturing groups extraction and live replacement.
Cron Expression Parser
Convert Cron expressions into plain human-readable descriptions. Predicts upcoming 5 scheduled execution timestamps.
Unix Timestamp Converter
Convert Unix Epoch timestamps to human-readable dates and vice versa. Features live clock counter, UTC, and ISO 8601.
Line Sorter & Text Utils
Sort text lines alphabetically or by length, remove duplicate lines, strip blank lines, and calculate real-time word & character stats.
RSA Key Pair Generator
Generate RSA asymmetric Public & Private key pairs (2048-bit or 4096-bit) in standard PEM format for SSH and JWT RS256.
Bcrypt Hash & Verifier
Generate secure Bcrypt password hashes and verify bcrypt matches with custom salt rounds (4-16).
SSL Cert Decoder
Decode X.509 SSL/TLS certificates online. Check domain names, Issuer CA, expiration date, and SANs.
Why Use Mini Tools?
During application development and coding, developers often need to format JSON files, encode URLs, convert Base64 strings, or process texts. Our tools are optimized for these tasks with high performance.
1. Privacy First (Secure Client-Side)
Unlike other online tools that upload your sensitive data to remote servers, all tools here process data completely on the client-side. Your inputs stay in your computer memory and never leave the browser.
2. Zero Latency with Next.js & React
Built with Next.js and Tailwind CSS for instant rendering and smooth state updates. The unified layout and persistent sidebar make switching between tools smooth and fast.