Free online developer tools

8 tools

Small utilities developers reach for daily: JSON and YAML formatters, Base64 and URL encoders, regex testers, JWT decoders, diff viewers and cron helpers. Prefer tools marked as running in your browser when you paste tokens, keys or production data, because nothing is uploaded.

Showing 1–8 of 8

0.578score
DevSensei Markdown Table Generator
DevSensei
Fill a grid and set column alignment to get a Markdown table, with offline use and no uploads.
ArtifactNo sign-upIn-browserdeveloper tools
0.569score
.env Toolkit
DevTools Daily
Parses and validates .env files, finds duplicate keys and secrets, compares environments and converts to JSON or YAML.
ArtifactNo sign-upIn-browserdeveloper tools
0.569score
cURL to Code Converter
DevTools Daily
Reads a pasted curl command and writes equivalent HTTP client code for several languages; the command is never run.
ArtifactNo sign-upIn-browserdeveloper tools
0.569score
Gzip and Brotli Inspector
DevTools Daily
Compresses text or decompresses gzip, zlib and Brotli payloads, including Base64 blobs, in the browser.
ArtifactNo sign-upIn-browserdeveloper tools
0.569score
JSON Escape and Unescape
DevTools Daily
Escapes or unescapes special characters in JSON strings in the browser.
ArtifactNo sign-upIn-browserdeveloper tools
0.569score
Remote MCP Server Inspector
DevTools Daily
Points at a remote MCP endpoint to browse the capabilities it exposes and try calling one with your own arguments.
ArtifactNo sign-upIn-browserdeveloper tools
0.569score
XML Formatter and Checker
DevTools Daily
Beautifies XML and flags syntax errors immediately, processing the text locally.
ArtifactNo sign-upIn-browserdeveloper tools
0.569score
XML Validator
DevTools Daily
Checks XML for malformed tags, nesting and attribute errors and reports document statistics locally.
ArtifactNo sign-upIn-browserdeveloper tools