Developer Tools Hub — Free Online Tool
Free tool: browser developer toolkit—JSON pointer/sort, JSON→CSV, Markdown tables, SQL formatter, CSV bars, JWT, regex, cURL, Base64 & more. No signup;…
Frequently asked questions: What is the best free JSON formatter online? Use Techtter’s JSON Formatter at /tools/json-formatter to pretty-print, minify, and inspect JSON Pointer paths in your browser—no paste is stored on our servers for typical use. How do I decode a JWT without uploading it? Open /tools/jwt-decoder, paste the token, and read header and payload claims locally. Signature verification still requires your keys—this page only Base64url-decodes for debugging. Can I test regex replacements in the browser? Yes—/tools/regex-tester uses JavaScript (ECMAScript) regex with live match highlighting and replace previews, handy when you cannot install desktop tools on a locked laptop. Do these developer tools upload my input? No. JSON, Markdown table generation, Base64, hashing, JWT decoding, CSV bar previews, and regex run entirely in your browser. The IP tool only calls a public geolocation API when you enter an IP.
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Frequently asked questions
- What is the best free JSON formatter online?
- Use Techtter’s JSON Formatter at /tools/json-formatter to pretty-print, minify, and inspect JSON Pointer paths in your browser—no paste is stored on our servers for typical use.
- How do I decode a JWT without uploading it?
- Open /tools/jwt-decoder, paste the token, and read header and payload claims locally. Signature verification still requires your keys—this page only Base64url-decodes for debugging.
- Can I test regex replacements in the browser?
- Yes—/tools/regex-tester uses JavaScript (ECMAScript) regex with live match highlighting and replace previews, handy when you cannot install desktop tools on a locked laptop.
- Do these developer tools upload my input?
- No. JSON, Markdown table generation, Base64, hashing, JWT decoding, CSV bar previews, and regex run entirely in your browser. The IP tool only calls a public geolocation API when you enter an IP.