100+ free tools·No sign up·100% free
Powerful Developer & SEO Tools. All Free.
Lightning-fast utilities in your browser — format JSON, encode Base64, generate UUIDs, test regex, and ship SEO-friendly pages. Built static-first for speed, privacy, and organic discovery.
- Fast & reliable
- Privacy first
- Developer made
{
"app": "DevBlogHubTools",
"tools": 100,
"mode": "client-side"
}✓ Valid JSON
⭐ Featured tool
JSON Formatter
Beautify, minify, and validate JSON instantly in your browser. Real-time feedback, syntax-aware highlighting, and no uploads — ideal for APIs, configs, and debugging.
- ✓Real-time formatting
- ✓Syntax error highlighting
- ✓Works offline in-tab
Top picks
100 matches · showing 24 of 100
- Formatters
JSON Formatter
Beautify, validate, and minify JSON in the browser.
👥 33K+ uses
- Formatters
JSON Validator
Check JSON syntax and highlight errors locally.
👥 31K+ uses
- Encoders
Base64 Encode/Decode
Encode or decode Base64 strings without uploading data.
👥 23K+ uses
- Encoders
URL Encoder/Decoder
Encode or decode URL components safely.
👥 76K+ uses
- Generators
UUID Generator
Generate RFC-4122 v4 UUIDs instantly.
👥 63K+ uses
- Security
Password Generator
Create strong passwords with custom rules.
👥 29K+ uses
- Text
Word Counter
Count words, characters, lines, and reading time.
👥 15K+ uses
- Text
Case Converter
Convert text between camelCase, snake_case, Title Case, and more.
👥 57K+ uses
- Text
Slug Generator
Turn headlines into clean URL slugs.
👥 89K+ uses
- Dev
Timestamp Converter
Convert Unix seconds/ms to human-readable dates and back.
👥 27K+ uses
- Security
JWT Decoder
Decode JWT headers and payloads (signature not verified).
👥 96K+ uses
- Formatters
HTML Minifier
Minify HTML snippets for smaller payloads.
👥 63K+ uses
- Formatters
CSS Minifier
Strip whitespace and comments from CSS.
👥 33K+ uses
- Formatters
JS Minifier
Lightweight JS minify for small scripts.
👥 19K+ uses
- Dev
Regex Tester
Test regular expressions with live matches.
👥 71K+ uses
- Dev
Color Converter
Convert HEX/RGB/HSL and copy values quickly.
👥 82K+ uses
- Text
Markdown Preview
Preview Markdown as HTML in the browser.
👥 82K+ uses
- Text
Text Diff
Compare two texts and see line-level differences.
👥 49K+ uses
- Generators
Random Number Generator
Generate random integers in a range.
👥 9K+ uses
- Generators
Lorem Ipsum Generator
Generate placeholder paragraphs and words.
👥 88K+ uses
- Security
Hash Generator
Compute SHA-256 digests of text (Web Crypto).
👥 50K+ uses
- Data
CSV to JSON
Convert simple CSV tables to JSON arrays.
👥 69K+ uses
- Data
JSON to CSV
Flatten JSON objects to CSV for spreadsheets.
👥 67K+ uses
- Web
Query String Parser
Parse and build URL query strings.
👥 16K+ uses
100+ free tools
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Static-first delivery
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Quick access to popular utilities
Free developer & SEO tools for everyday shipping
DevBlogHub bundles 100+ browser-based utilities — JSON formatters and validators, Base64 and URL encoders, UUID and hash generators, JWT helpers, regex testers, CSV/JSON/YAML converters, text counters, and SEO-focused helpers — so you can move faster without installing desktop software.
Tools are designed for privacy-aware workflows: processing stays in your browser when possible, pages are static-first for speed, and the site structure helps search engines discover long-tail tool pages. Whether you are debugging an API payload, preparing content, or validating data, you get a consistent, fast UI on desktop and mobile.