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Format, inspect and convert with tools that work right in your browser. Find your utility, paste your input and get back to building.
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- 81+ utilities
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"project": "next-idea",
"ready": true,
"tools": 81
}Popular Developer Utilities
10 FeaturedTop tools used by engineers for instant daily formatting, encoding, and debugging.
JSON Formatter, Validator & Escape
Format, validate, beautify, escape, and unescape JSON data with instant syntax error detection.
JWT & JWS Decoder [RFC 7515 Compact Parser]
Decode JWT and JWS tokens online without secret keys. Inspect header claims, payload, expiration, and signatures 100% privately in-browser with zero uploads.
Base64, Hex & Binary Converter Online
Convert text, hex, base64 and 8-bit binary strings with custom byte delimiters and endianness. 100% free, private client-side converter in your browser.
Regex Tester & Debugger Online — ReDoS-Safe Sandbox
Test, debug, and validate regular expressions online in real-time with visual match highlighting, group extraction, cheat sheet, and ReDoS protection.
Cryptographic Hash Generator & MD5 Checksum
Generate and verify MD5, SHA-1, SHA-256, and SHA-512 hashes simultaneously with live checksum matching. 100% private in-browser hashing with zero server logging.
QR Code Generator Online — Create Custom QR Codes (PNG & SVG)
Generate custom QR codes online for URLs, WiFi, vCards, and text. Add logo overlays, custom colors, and export high-res vector SVG or PNG instantly.
SQL Beautifier & Online SQL Query Formatter
Format, standardize, and prettify SQL queries for Db2, PostgreSQL, MySQL, and SQLite.
Text & JSON Diff Checker Online
Compare text, code, and JSON files side-by-side with visual semantic tree diff, whitespace ignore, and syntax highlighting. 100% free, private in-browser.
Vector & SVG to Font Converter (TTF & Webfont)
Convert vector graphics (SVG, EPS paths) and IcoMoon projects into real TTF font binaries in-browser. Live glyph preview, CSS @font-face — zero uploads.
Parse CSR & X.509 Certificate Decoder
Parse CSR online and decode X.509 SSL TLS certificates (.pem, .crt, .csr). Inspect Subject, SANs, validity dates, and public keys 100% in-browser.
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Structured tool collections optimized for software development, data manipulation, and web security.
Developer Tools
JSON, SQL, XML, CSV, Diff, Code Minifiers
Security & Crypto
JWT, Hashes, HMAC, Bcrypt, UUID, AES
Networking & Web
Subnet, IPv6, HAR Analyzer, DNS, Robots.txt
Content & Text
Markdown, Word Counter, Slug, Deduplicator
Design & CSS
Glassmorphism, Flexbox, SVG to PNG, Contrast
Finance & Math
Loan EMI Calculator & Precision Math
AI & Engineering
Prompt Token Counter & LLM Estimators
Complete Tools Directory
Browse our entire indexable directory with instant category grouping and search.
DEVOMNITOOLS / GUIDES
Build with understanding
Practical guides for tokens, certificates and icon fonts. Understand the format before working with it.
How the tools work & common questions
Browser tools for everyday development
Local core processing, optional AI and clear offline requirements.
Local core tools
Convert SVG to font icons, decode JWS and JWT claims, format JSON, and parse CSR or X.509 certificates directly in client-side browser memory.
Offline after caching
Cached pages and required assets support local tools offline. AI and contact delivery require internet.
AI after consent
Only request AI help when you are comfortable sharing the selected snippet with the configured providers. Requests have a daily quota.
Frequently asked questions
Local core processing, optional AI and clear offline requirements.
Q: Does my input leave my device?
Core tools process input locally. Optional AI sends the selected snippet through Cloudflare to Cloudflare AI or the optional Google Gemini fallback after consent; provider retention policies apply. Contact submissions send your details to our email provider. Offline use requires the page and its assets to finish caching; external AI and contact delivery require internet.
Q: Can I work offline?
Cached pages and required assets support local tools offline. AI and contact delivery require internet.
Q: Are there usage limits?
Core tools are free. Optional AI and contact submissions have server-side quotas and depend on provider availability.
Q: Is independent security certification provided?
The security page describes implementation and internal checks. It does not establish independent certification or guarantee legal compliance for your organization.
Local core tools
Convert SVG to font icons, decode JWS and JWT claims, format JSON, and parse CSR or X.509 certificates directly in client-side browser memory.