// Hitechies Tools
Free tools for
Free tools for
developers & builders
26 browser-based utilities for developers, security engineers and crypto traders. No signup. No data uploaded. Everything runs locally.
28
Tools
0
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Free
Forever
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Developer
13 tools
Most used
JSON Formatter
Format, validate & beautify JSON. Fix syntax errors with line numbers.
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Base64 Encoder
Encode & decode Base64 text, files and images. URL-safe encoding supported.
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Private
JWT Decoder
Inspect JSON Web Tokens. View header, payload & expiry. Never transmitted.
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Regex Tester
Test regular expressions live with real-time match highlighting.
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Timestamp Converter
Convert Unix timestamps to readable dates. Seconds & milliseconds.
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Markdown → HTML
Convert Markdown to HTML with live preview. GitHub-flavoured Markdown.
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UUID Generator
Generate UUIDs v1, v4 and v5 in bulk. One-click copy.
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CSS Minifier
Minify CSS for production. Remove whitespace and comments.
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New
Diff Checker
Compare two texts and see exactly what changed. Unified & split view.
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New
Color Picker
HEX, RGB, HSL converter. Shades, harmonies & WCAG contrast check.
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IP Lookup
Find geolocation, ISP and threat intelligence for any IP address.
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New
Code Screenshot
Turn code into beautiful images. 7 themes, custom backgrounds. Download PNG.
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New
README Generator
Build beautiful GitHub README files in minutes. Free + premium Hitechies sections.
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Security
4 tools
Popular
Password Generator
Cryptographically secure passwords. Custom length, symbols, character sets.
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Hash Generator
Generate MD5, SHA-1, SHA-256 & SHA-512. Verify file integrity instantly.
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SSL Checker
Check SSL certificate validity, expiry date and issuer for any domain.
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Popular
QR Code Generator
Generate QR codes for URLs, WiFi, email & text. Download PNG.
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Crypto
5 tools
Any coin
Crypto P&L Calculator
Calculate profit & loss on any trade. Fees, ROI and break-even price.
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Satoshi Converter
Convert between Satoshi, mBTC, Bitcoin and USD with live prices.
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Unique
DeFi APY Calculator
Calculate compound yields from DeFi protocols. Compare APY vs APR.
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Gas Fee Estimator
Estimate Ethereum gas fees for swaps, transfers and contracts.
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Earns fees
Batch Token Sender
Send tokens to hundreds of wallets in one transaction. Airdrops & DAO payroll.
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AI
2 tools
No competitor
AI Benchmark Comparator
Compare GPT-5.5, Claude & Gemini across coding, reasoning and safety.
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AI Token Counter
Count tokens for GPT-4, Claude & Gemini. Estimate API costs before you send.
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New
Meta Tag Previewer
Preview your page in Google, Twitter/X & LinkedIn. Generate meta tags.
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Image
1 tool
Text
1 tool
All tools run in your browser. No data is ever uploaded or stored.
Related reading
- Free JSON Formatter & Validator
- Free Password Generator
- Free JWT Decoder & Inspector Online
- Free QR Code Generator
- Free Base64 Encoder & Decoder
- Free Regex Tester Online
- Unix Timestamp Converter
- Free Hash Generator — MD5, SHA-256
- Free Markdown to HTML Converter
- Free UUID Generator Online
- Free CSS Minifier Online
- Free Satoshi to Bitcoin Converter
- Free Ethereum Gas Fee Estimator
- AI Model Benchmark Comparator