Format code, test patterns, generate IDs — all running locally in your browser with zero tracking.
Format, validate, and beautify JSON data. Minify or prettify with customizable indentation. Syntax highlighting included.
Generate MD5, SHA-1, SHA-256, and other cryptographic hashes. Perfect for file integrity verification.
Pick and convert colors between HEX, RGB, HSL formats. Generate color palettes and gradients.
Generate UUID v4 identifiers. Batch generation supported for multiple unique IDs at once.
Test and debug regular expressions with real-time matching. Supports JavaScript regex syntax.
Compare two text snippets or files to find differences. Highlight additions, deletions, and changes.
Write and preview Markdown in real-time. Export to HTML or styled PDF. Features syntax highlighting.
Convert PNG or JPG images to ICO format for website favicons or application icons.
Open a tool and use it instantly. Nothing to set up.
Everything runs in your browser. Your code never leaves the device.
Clean UI, keyboard shortcuts, and thoughtful defaults.
Stop installing npm packages just to format JSON or test a regex. Filemint's developer tools run entirely in your browser— bookmark them and access instantly from any machine. No VS Code extensions, no command-line tools, no setup required.
Many developers work under NDAs or in secure environments. Pasting proprietary code into cloud-based tools creates compliance risks. Filemint processes everything locally—your regex patterns, JSON configs, and code snippets never leave your laptop.
We understand developer workflows. Keyboard shortcuts, syntax highlighting, error messages that actually help, and performance optimized for large files. Built by developers, for developers.
Everything you need to know about our developer tools
Absolutely! All tools run entirely in your browser—nothing is sent to any server. This makes FileMint perfect for hashing passwords, generating UUIDs for production, formatting API responses with sensitive data, and testing regex patterns on confidential logs.
Yes! Our UUID v4 generator uses the Web Crypto API for cryptographically secure random number generation. The UUIDs are fully RFC 4122 compliant and suitable for database primary keys, session tokens, and any production use case.
Yes, it supports the full JavaScript regex syntax including named groups, lookbehinds, Unicode property escapes, and all flags (g, i, m, s, u, y). It also shows capturing groups and provides real-time match highlighting.
We support MD5, SHA-1, SHA-256, SHA-384, and SHA-512. You can hash both text strings and files of any size. All hashing uses the native Web Crypto API for maximum security and performance.
Yes! Since processing happens locally, there are no size limits. We've tested with multi-megabyte JSON files. The formatter also validates syntax and shows clear error messages with line numbers for any issues.
Yes. Once the page loads, many developer tools can run offline. This is useful for secure environments, travel, or privacy-focused workflows.
Discover all our privacy-first conversion and processing tools
