Format, convert, generate, and inspect — 16 tools, nothing leaves your browser.
Paste your JSON, your regex, your CSV — fwip processes it locally. No data transmitted, no server logs, no third-party analytics. Just tools that work.
Developer and data tools handle the small tasks that come up constantly. Formatting a messy JSON payload. Generating a hash to verify a file. Encoding a string to Base64. Comparing two config files. Testing a regex before deploying it. Converting between CSV and JSON.
Most online tools in this space — JSONLint, CodeBeautify, various regex testers — process your input on their servers. For public data, that's fine. For API keys, tokens, private configs, customer data, or anything sensitive, it's a risk.
fwip runs every tool in your browser. Your data never touches a network request. That makes these tools safe to use with production data, credentials, and sensitive content.
When you paste JSON into an online formatter, that data hits a server. When you test a regex with sample data on a website, that sample travels over the network. For public data, that's harmless. For anything sensitive — API responses with tokens, configs with credentials, customer records — it's a leak waiting to happen.
fwip's data tools run entirely in your browser. Your input never leaves the tab. That means you can safely format production JSON, test regex against real data, and generate hashes for sensitive files without thinking about who's logging what.
No account, no analytics on your input, no server-side processing. Just tools.
| fwip | JSONLint | CodeBeautify | QR Code Generator | |
|---|---|---|---|---|
| Upload required | No | Yes | Yes | No |
| Account required | No | No | No | No |
| Subscription | No | No | No | No |
| Files leave device | No | Yes | Yes | No |
| Works offline | Yes | No | No | No |
| Batch processing | N/A | No | No | No |
JSON Formatter
Format, validate, and pretty-print JSON with syntax highlighting.
CSV ↔ JSON Converter
Convert between CSV and JSON formats instantly.
Base64 Encode/Decode
Encode and decode Base64 — text and files.
URL Encode/Decode
Encode and decode URL strings instantly. Smart full-URL mode.
Image to Base64
Convert any image to a Base64 string. Copy data URL or raw.
Diff Checker
Compare two texts. Line-by-line and word-level diffs.
Word Counter
Count words, characters, sentences, and reading time instantly.
Regex Tester
Test regex patterns with live match highlighting, flags, and capture groups.
Timestamp Converter
Convert Unix timestamps to human dates and back. Seconds and milliseconds.
Use it free in your browser. Buy it if you want bigger files, batch jobs, offline use, and permanent ownership.