DevForge Tools: Free Online Developer and Marketing Tools for Professionals

Your entire
toolkit.
One place.

Ten powerful browser-based tools for developers and digital marketers. Free forever, no login, no limits. Works entirely in your browser.

10+

Tools

Cost

100%

Browser-based

Signup needed

// Tool Suite

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📊

CSV to JSON Converter

Paste CSV data, get clean JSON output instantly

Data

🔧

JSON Formatter

Format, validate and minify JSON data

Data

🏷️

Meta Tag Generator

Generate SEO meta tags with live SERP preview

SEO

🔗

UTM Link Builder

Build campaign tracking URLs for Google Analytics

Marketing

📝

Word Counter

Count words, characters, sentences and reading time

Writing

🔐

Base64 Encoder

Encode and decode Base64 strings instantly

Encoding

🎨

Hex to RGB Converter

Convert colour codes between HEX, RGB and HSL

Design

✍️

Markdown to HTML

Convert Markdown text to clean HTML with preview

Dev

🤖

Robots.txt Generator

Build a robots.txt file for any website or CMS

SEO

🔤

Text Case Converter

Convert text to camelCase, snake_case, UPPER, title and more

Text

Why professionals use DevForge Tools

Free CSV to JSON Converter for developers

Converting CSV files to JSON is one of the most common tasks in modern web development and data engineering. Whether you are migrating data between systems, preparing a dataset for an API, or cleaning e-commerce product exports from Shopify or WooCommerce, a reliable browser-based CSV to JSON converter saves hours of manual reformatting.

DevForge Tools processes your CSV data entirely in the browser. No file is uploaded to any server, no data is stored, and there are no row limits. The converter handles headers automatically and produces clean, properly escaped JSON arrays ready for immediate use.

Meta tag generator with live SERP preview

Getting your meta tags right is foundational to search engine optimisation. The title tag and meta description are the first things a potential visitor sees in Google search results, making them critical for both click-through rate and keyword relevance signals.

The DevForge meta tag generator produces properly formatted HTML tags for title, description, keywords, author, and Open Graph social sharing. The live SERP preview shows exactly how your page will appear in Google search results before you publish, helping you optimise within the 60-character title and 160-character description limits that Google displays.

UTM link builder for campaign tracking

UTM parameters are the standard method for tracking the source, medium, and campaign name of inbound traffic in Google Analytics and GA4. Without proper UTM tagging, traffic from email campaigns, paid ads, and social media appears as direct traffic in your analytics, making it impossible to measure return on investment accurately.

The UTM builder generates correctly formatted campaign URLs following Google's UTM parameter specifications. All five parameters are supported: source, medium, campaign, term, and content. Generated links are ready to paste directly into ad platforms, email tools, or social schedulers.

JSON formatter and validator for clean code

Malformed JSON is one of the most common causes of API integration failures and data pipeline errors. A single missing comma or unescaped character renders an entire JSON payload invalid, often producing cryptic error messages that are difficult to debug without a proper validator.

The DevForge JSON formatter validates your JSON against the JSON specification, reports exact error locations, and reformats valid JSON with proper indentation for human readability. The minify function removes all whitespace for production use where file size matters, such as API responses or configuration files embedded in front-end applications.

Frequently asked questions

All DevForge Tools run entirely in your browser using JavaScript. No data is sent to any server, no content is stored, and no account is required. Your CSV files, JSON data, text, and URLs never leave your device. This makes DevForge Tools safe to use with confidential business data, API keys, and sensitive content.

No. Every tool on DevForge is completely free with no account, no email, and no signup required. Open any tool, use it immediately, and close the tab. There are no usage limits, no paywalls, and no premium tiers.

Paste your CSV data into the input field with the first row containing your column headers. Ensure "First row is header" is checked. The converter automatically parses comma-separated values and produces a JSON array where each row becomes an object with keys matching your headers. For CSV files with unusual delimiters or quoted fields containing commas, the converter handles standard RFC 4180 CSV format.

UTM parameters are tags added to the end of URLs that tell Google Analytics exactly where a visitor came from. Without UTM tags, traffic from your email campaigns, paid ads, and social posts is often recorded as direct traffic, making your analytics misleading. The five UTM parameters are: utm_source (where the traffic comes from), utm_medium (the marketing channel), utm_campaign (the specific campaign name), utm_term (for paid search keywords), and utm_content (for A/B testing different links).

Google typically displays meta descriptions up to 155 to 160 characters in desktop search results. Descriptions longer than this are truncated with an ellipsis. For mobile results the limit is slightly shorter at around 120 characters. The DevForge meta tag generator shows a live character count and SERP preview so you can optimise your description before publishing. Note that Google sometimes rewrites meta descriptions when it determines the page content better answers a specific query.

Yes. DevForge Tools is fully responsive and works on smartphones and tablets. All tools are accessible on any modern mobile browser including Chrome, Safari, and Firefox. The layout adapts for smaller screens with single-column input and output areas.