code

Developer Tools

Free developer tools: format JSON, convert Excel to JSON, generate UUIDs, test regex, minify CSS, and more. All processing done in your browser.

table_view

Excel to JSON

Convert Excel spreadsheets (.xlsx, .csv) into formatted JSON arrays for use in web applications and APIs.

Open arrow_forward

description

Excel ⇄ XML Converter

Convert Excel files to XML and XML back to Excel instantly. No upload, no server, 100% browser-based.

Open arrow_forward

data_object

JSON Formatter

Beautify, validate, and minify JSON data. Highlight syntax errors and format messy JSON into a readable tree structure.

Open arrow_forward

code

JSON to Dart

Instantly generate strongly-typed Dart classes from JSON objects. Essential for Flutter developers using API responses.

Open arrow_forward

widgets

HTML to Flutter

Convert standard HTML code into Flutter Widget trees automatically. Save time building layout structures for mobile apps.

Open arrow_forward

css

CSS Minifier

Minify and compress CSS code to reduce file size and improve website load times. Remove whitespace and comments instantly.

Open arrow_forward

rule

Regex Tester

Test, debug, and validate regular expressions against text strings, with visual highlighting for matches and groups.

Open arrow_forward

fingerprint

UUID Generator

Generate cryptographically unique UUIDs (v1 and v4) for databases and identifiers. Bulk generation supported.

Open arrow_forward

enhanced_encryption

Base64 Encoder

Encode text or binary data to Base64 strings and decode them back. Compatible with UTF-8 and other charsets.

Open arrow_forward

markdown

Markdown to HTML

Convert Markdown syntax into clean, semantic HTML markup. Ideal for bloggers and content management systems.

Open arrow_forward

About Developer Tools

ToolWeb's free online developer tools are designed to help developers, designers, and creators work faster without downloading any software. Every tool in this category runs directly in your web browser, ensuring your files and data remain private and secure.

Whether you need to quickly convert, edit, or generate resources, our developer tools deliver professional results instantly. All tools are optimized for performance and are completely free to use — no sign-ups, no watermarks, and no file size limits.

Why Choose ToolWeb's Developer Tools?

check_circle 100% Browser-Based — No software installation needed
check_circle Privacy First — Your files never leave your device
check_circle Completely Free — No hidden fees or subscriptions
check_circle Fast & Reliable — Instant results with modern algorithms