Developer Tools
Fast browser-based utilities for developers and data work.
JSON Formatter
Format and validate JSON locally.
JSON Minifier
Minify JSON without sending it to a server.
Base64 Encode / Decode
Encode or decode Base64 text locally.
Base64 to Image
Turn a Base64 image string back into an image file locally.
Hash Generator
Generate common cryptographic hashes in your browser.
URL Encode / Decode
Encode or decode URL components locally.
JSON to CSV
Convert an array of JSON objects into CSV locally.
CSV to JSON
Convert CSV data into structured JSON in your browser.
UUID Generator
Generate UUID v4 identifiers locally with your browser.
Timestamp Converter
Convert Unix timestamps and date/time strings locally.
HTML Formatter
Format and indent HTML source code locally.
HTML Minifier
Minify HTML source code locally by removing unnecessary whitespace.
XML Formatter
Format and indent XML locally for easier reading.
XML Minifier
Remove unnecessary whitespace from XML locally.
JSON to XML
Convert JSON objects and arrays into XML locally.
XML to JSON
Convert XML into a readable JSON representation locally.
JSON to TypeScript
Generate TypeScript interfaces from JSON objects locally.
JWT Decoder
Decode JWT header and payload sections without sending the token anywhere.
URL Parser
Break a URL into protocol, host, path, query and fragment components.
Query String Builder
Build an encoded URL query string from key=value pairs.
Duplicate File Finder
Compare selected files by SHA-256 hash and report duplicate groups without uploading them.
Binary Viewer
Inspect the first portion of any local file as byte values and printable characters.
Hex Viewer
Create a classic hexadecimal dump of the selected local file.
JSON to YAML
Convert JSON data to readable YAML locally without sending it to a server.
HTML to Markdown
Convert common HTML headings, lists, links, emphasis and paragraphs to Markdown locally.
CSS Formatter
Beautify CSS with indentation and readable rule blocks locally.
CSS Minifier
Remove comments and unnecessary CSS whitespace locally.
JavaScript Formatter
Apply lightweight browser-side indentation to common JavaScript source code.
JavaScript Minifier
Remove comments and safe whitespace from common JavaScript source code locally.
SQL Formatter
Format common SQL statements with readable indentation and line breaks locally.
Meta Tag Generator
Generate SEO title, description, canonical and social meta tags in your browser.
Open Graph Generator
Generate Open Graph and social-sharing meta tags locally.
robots.txt Generator
Generate a robots.txt file from crawl rules entered in the browser.
sitemap.xml Generator
Build a sitemap.xml document from URLs entered in the browser.
About Developer Tools
Fast browser-based utilities for developers and data work. Every tool in this category runs directly in your browser — there's no upload step, no account, and no watermark added to your result. Select a tool above to get started, or use the search box to jump straight to what you need.
Frequently asked questions
Do I need to upload my files to use these Developer Tools?
No — tools in this category are built to run in your browser, so files are processed on your own device rather than sent to a server.
Are these Developer Tools free to use?
Yes, every tool here is free with no account required.
How many Developer Tools does VineFileLab have?
34 tools are currently available in this category, with more added over time.