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Developer Tools

Free developer tools that run entirely in your browser. Format JSON, encode/decode Base64, test regex, decode JWTs, format SQL, generate gradients, look up HTTP codes, and more.

27 free tools · 100% browser-based · No signup

Developer Open tool
JSON Formatter & Validator
Format, validate, minify JSON. Tree view, error highlighting with line numbers, path copying.
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Developer Open tool
HTML/CSS/JS Minifier & Beautifier
Minify or beautify HTML, CSS, JavaScript code. Shows file size savings percentage.
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Base64 Encoder / Decoder
Encode/decode text and files to Base64. UTF-8 safe. Shows byte size. One-click copy.
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Regex Tester & Builder
Test regex patterns with real-time match highlighting. Captured groups, flags toggle, built-in cheat sheet.
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CSS Gradient Generator
Build linear, radial, conic gradients visually. Add color stops, adjust angles, copy CSS code instantly.
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Markdown Editor & Preview
Split-pane markdown editor with live preview. Toolbar for formatting. Export as HTML. GitHub-flavored support.
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URL Encoder / Decoder
Encode/decode URLs and query parameters. Handles special characters and UTF-8. Parse URL into components.
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Epoch / Timestamp Converter
Convert Unix timestamps to dates and back. Live current timestamp. Timezone support. Milliseconds toggle.
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Cron Expression Generator
Build and parse cron expressions visually. See next run times, get human-readable descriptions, common presets.
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JWT Decoder & Encoder
Decode JWT tokens instantly. See header, payload, expiration. Encode tokens with custom claims and HMAC signing.
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XML Formatter & Validator
Format, validate, and minify XML. Tree view, XPath finder, syntax highlighting, element stats.
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SQL Formatter & Beautifier
Format, beautify, and minify SQL queries. Syntax highlighting, keyword uppercasing, common templates.
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chmod Calculator
Visual Linux file permission calculator. Checkboxes, octal, symbolic notation, umask calculator, common presets.
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HTTP Status Codes Reference
Complete HTTP status code reference. Search, filter by category, see use cases and examples for all codes.
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HTML Entity Encoder & Decoder
Encode and decode HTML entities. Named, decimal, hex formats. Searchable entity reference table.
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Tailwind Color Finder
Find the nearest Tailwind CSS, Material Design, or CSS named color for any HEX code. Visual comparison, color distance, full palette browser.
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Fake Address Generator
Generate realistic fake addresses for testing forms, demo data, and UI mockups. US, UK, and Canada.
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Binary Translator
Convert text to binary and binary back to text instantly. Supports UTF-8.
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Data Storage Converter
Convert between bytes, KB, MB, GB, TB, PB. Decimal or binary.
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Password Strength Checker
Test password strength and entropy. Browser-only, never transmitted.
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Cron Expression Parser
Translate cron expressions into plain English.
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YAML to JSON Converter
Convert YAML to JSON in your browser.
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CSS Box Shadow Generator
Build CSS box-shadow visually with live preview.
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EM to PX Converter
Convert CSS em, rem, and px with custom base font size.
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User Agent Parser
Parse any User-Agent string into browser, OS, engine, and device.
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SVG Compressor
Compress SVG files safely in your browser. Remove comments, collapse whitespace, and reduce SVG code size fast.
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SVG Optimizer
Clean and optimize SVG markup with safe toggles for comments, metadata, whitespace, decimals, and empty groups.
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Popular in Developer

The most-used tools in this zone — start here if you're not sure where to begin.

About Developer Tools

Free developer tools that run entirely in your browser. Format JSON, encode/decode Base64, test regex, decode JWTs, format SQL, generate gradients, look up HTTP codes, and more. Every tool on this page runs 100% in your browser — your files, text, and data never leave your device. No signup, no API keys, no upload limits.

Why use BreezyTools for developer?

BreezyTools offers 27 free developer tools alongside other tools across 15 categories. Everything is fast, private, and free forever — no premium tier, no ads in your face, no tracking your inputs. Browse the full tool catalog or jump to another category from the footer below.

Frequently asked questions

Is this safe to use with sensitive code or data?

Yes. Every developer tool runs locally in your browser — your code, JSON, regex patterns, and data are never sent to a server.

Do these work offline?

Once loaded, most developer tools work fully offline. You can disconnect your internet and keep using them.

Can I use these in CI/CD pipelines?

These are browser tools, not CLI tools — but they're great for ad-hoc work, debugging, and one-off transformations during development.