Format JSON, test regex patterns, generate UUIDs, hash data, and convert file formats — all browser-based with local privacy.
“Online JSON formatters that log your API payloads”
“Regex testers that require signup to save patterns”
“Bouncing between 5 different sites for simple utilities”
“Tools that break with large input or slow down”
Problem
“Need to format or validate a JSON payload”
Solution
Format, validate, and minify JSON with syntax highlighting.
Try it freeProblem
“Testing a complex regex pattern”
Solution
Live regex testing with match highlighting and group capture.
Try it freeProblem
“Need to generate UUIDs for database records”
Solution
Generate v4 UUIDs in bulk — copy with one click.
Try it freeProblem
“Need to verify a file checksum”
Solution
Compute MD5, SHA-1, and SHA-256 hashes entirely client-side.
Try it freeThe definitive JSON workshop for developers. Transform minified payloads into readable structures, catch syntax errors in real-time, and prepare your data for production with zero cloud exposure.
The ultimate regex playground for developers. Pattern match, capture, and replace in real-time without ever uploading your sensitive text to a server.
Create UUIDs with support for v1, v4, v5 versions, bulk generation, validation, and customizable formatting. Perfect for developers and databases.
The "Digital Fingerprint" factory. Create one-way cryptographic hashes using the Web Crypto API for maximum security, speed, and privacy without cloud exposure.
The "Safe House" for your data. Encode sensitive strings, create data URIs, and decode API payloads with high-fidelity UTF-8 support and zero cloud exposure.
Spot the difference instantly. Compare two snippets side-by-side with clear highlighting for added and removed text without ever uploading your data. Designed for developers and writers.
Your code and data remain within your browser context
Tool input stays within the browser processing flow
WebAssembly is used where it improves local processing
Cached tools can remain available without a connection
Files stay on your device
Free forever, no hidden fees
No signup required
Installable as a PWA
Formatting and validating API response JSON
Testing and debugging regex patterns
Generating UUIDs for database seeding
Hashing passwords or verifying file integrity
Encoding/decoding Base64 for data transfer
Comparing code or config file diffs
Yes. FileMint has no paid tier or daily usage cap. All 59+ listed tools are available without creating an account. Practical file limits depend on your browser and device memory.
Supported file processing runs in your browser, so the files you select remain on your device. Site features such as consented analytics can use normal network requests, but tool inputs are not sent with them.
No. FileMint requires no signup, no email, and no credit card. Just open a tool and start working.
FileMint is installable as a Progressive Web App. Previously loaded pages and assets may remain available offline, depending on the tool, browser, and cached resources.
Open the tool you need and process supported files in your browser. No signup and no daily usage cap.
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