Code Tools Suite – HTML, CSS, JS, JSON Formatter & More | ToolWise
Developer Suite

Code Tools Suite

10 essential developer utilities in one place — HTML/CSS/JS formatter & minifier, JSON beautifier, code diff checker, color converter, CSS gradient builder, number base converter, hash generator, JWT decoder, and character encoder. All browser-based, zero uploads.

100% Private Instant 10 Tools No Upload
Code Formatter / Beautifier
Input: 0 chars
Output: 0 chars
Lines: 0
Format Options
Indent With
Indent Size
Max Line Length
Semicolons (JS)
Single Quotes (JS)
Trailing Commas (JS)
Analysis
LanguageHTML
Syntax Valid—
Complexity—
Code Minifier
Before: 0
After: 0
Saved: 0%
Options
Remove Comments
Remove Whitespace
Collapse Booleans (JS)
Remove Redundant CSS
Savings
Original Size—
Minified Size—
Reduction—
Comments Removed0
JSON Beautifier & Validator Ready
JSON Analysis
Valid JSON—
Size—
Keys (total)—
Max Depth—
Arrays—
Null Values—
Options
Indent Size
Quote Style
Code Diff Checker
+0 -0
Paste code in both editors to see the diff.
Options
Ignore Whitespace
Ignore Case
Show Unchanged
Summary
Lines Added0
Lines Removed0
Unchanged0
Similarity—
Color Converter
Color Info
Name—
Luminance—
Perceived—
Contrast on White—
Contrast on Black—
WCAG on White—
WCAG on Black—
Complementary
CSS Gradient Generator
Gradient Settings
Type
Angle
135°
Repeating
Vendor Prefixes
Presets
Number Base Converter
Number Info
Decimal Value—
Is Power of 2—
Is Prime—
Is Even/Odd—
Bit Length—
Bytes Needed—
Hash Generator
Enter text above to generate hashes
Hash Verify
Info
Input Length0 chars
Input Bytes0 B
All hashing is done locally in your browser using the Web Crypto API. Nothing is sent to any server.
JWT Decoder & Inspector Paste a token
Token Info
Algorithm—
Token Type—
Subject—
Issuer—
Issued At—
Expires—
Status—
Notice

This tool only decodes — it does not verify the signature. Never paste production secrets into any online tool.

Character Encoder / Decoder
Input: 0
Output: 0
Ratio: —
Mode Info
Char Analysis
Characters0
Bytes (UTF-8)0
Non-ASCII0

Free Online Code Tools for Developers

10 essential developer utilities all in one suite. Every tool runs entirely in your browser — no code is ever sent to a server. Fast, private, and always available.

Code Formatter

Beautify and format HTML, CSS, JavaScript, and SQL with configurable indent size, line length, semicolons, quote style, and trailing commas.

Code Minifier

Minify HTML, CSS, and JavaScript to the smallest possible size. Shows exact byte savings and percentage reduction with a visual progress bar.

JSON Tools

Beautify, minify, validate, and sort JSON keys. Convert JSON to XML. Real-time validation with detailed error messages and structural analysis.

Code Diff

Side-by-side code diff with line-level changes, added/removed counters, similarity score, ignore whitespace and case options.

Color Converter

Convert colors between HEX, RGB, RGBA, HSL, HSLA, HSV, CMYK, CSS named colors. Shows shades, tints, WCAG contrast ratios and complementary colors.

CSS Gradient

Visually build linear, radial and conic CSS gradients. Unlimited color stops, angle control, repeating mode, presets and one-click CSS copy.

Number Base Converter

Convert numbers between decimal, binary, octal, hexadecimal, base 32, 36, and 64. Bit visualization and number properties (prime, power of 2, etc.).

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes using the Web Crypto API. Includes hash verification tool to compare against an expected value.

JWT Decoder

Decode and inspect JWT tokens — view header, payload, and signature. Shows algorithm, expiry, issued-at time, subject and issuer claims.

Char Encoder

Encode and decode text in Base64, URL encoding, HTML entities, Unicode escape sequences, ASCII codes, and Morse code.

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