The Free Online
Web & Developer Tools Suite
Streamlined, privacy-guaranteed formatters, validators, encoders, and CSS generators. Built for developers, designers, and marketers. Your code never leaves your browser.
JSON Formatter & Validator
Beautify, validate, format, and minify JSON data instantly in your browser.
Base64 Encoder & Decoder
Encode and decode plain text, URLs, and data URIs to and from Base64 format.
JWT Token Decoder & Inspector
Decode and inspect JSON Web Tokens (Header, Payload, and Expiration) safely in your browser.
Cryptographic Hash Generator
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes instantly from any text.
URL Encoder & Decoder
Encode and decode query strings, path segments, and special characters for URLs.
SQL Query Formatter & Beautifier
Beautify, indent, and format messy SQL queries into clean, readable code.
Text & Code Diff Checker
Compare two pieces of text or code side-by-side to find additions, deletions, and differences.
CSS Glassmorphism Generator
Design modern frosted glass UI elements with live preview and instant CSS code output.
CSS Box Shadow & Elevation Generator
Create smooth, multi-layered realistic CSS box shadows with live visual feedback.
Color Converter & Contrast Checker
Convert between HEX, RGB, HSL, and CMYK formats with real-time WCAG contrast auditing.
SEO Meta Tag & Social Card Generator
Generate Google SEO meta tags, Open Graph cards, and Twitter Cards with live previews.
Instant QR Code Generator
Create custom high-resolution QR codes for URLs, WiFi networks, emails, and plain text.
Word, Character & Reading Time Counter
Real-time text analyzer for words, characters, sentences, paragraphs, and reading time.
Lorem Ipsum Dummy Text Generator
Generate customizable placeholder dummy text in paragraphs, sentences, or words.
Why Developers & Designers Trust FeieSoft
Engineered specifically to solve everyday workflow bottlenecks without compromising your private data.
100% Client-Side Privacy
Unlike traditional tool sites that send your confidential JSON or tokens to remote servers, FeieSoft processes everything inside your browser's local sandbox.
Sub-millisecond Performance
Zero bloated third-party trackers, zero heavy framework lag. Hand-optimized Vanilla JavaScript guarantees instantaneous results even on slow internet connections.
Free, Unmetered Access
No paywalls, no monthly subscription limits, and no account creation required. Open any tool and get your work done in seconds.
Frequently Asked Questions
Everything you need to know about using FeieSoft online utilities.
Yes, all utilities on FeieSoft.com are completely free to use for personal, academic, and commercial purposes without limitations or subscriptions.
Never. All data entered into FeieSoft tools remains inside your browser. We do not transmit, log, or store your text, tokens, or queries on our servers.
No installation is necessary. FeieSoft operates smoothly across all modern web browsers on Windows, macOS, Linux, iOS, and Android.
You can press Ctrl + D (or Cmd + D on Mac) to bookmark feiesoft.com. You can also press Ctrl + K anywhere on the site for instant tool navigation.