Developer utilities without the upload anxiety.
DevsDrill is a free hub of everyday developer utilities that run entirely in your browser. The catalog covers character counting, URL parsing and URL diff, an HTML online viewer with live preview, JWT decoding, JSON to CSV and CSV to JSON conversion, SQL formatting, regex testing with explanations, curl-to-code conversion, text and code diffs, Base64 encode and decode, cron expression building and humanization, and GUID or UUID v4 generation. The product goal is simple: give you a fast answer without forcing an account, a download or an upload of sensitive sample data.
Privacy is the default architecture, not a marketing line. When you paste a JWT, a curl command with Authorization headers, an internal SQL query or a draft HTML email, the work happens in client-side JavaScript on your machine. DevsDrill pages are static; we do not operate a backend that receives your tool inputs. The site is supported by Google AdSense and optional PayPal or PIX donations so hosting can stay online. For JSON formatting and validation, try the sister tool JSON Quiet, which follows the same private, browser-first approach.
Who is DevsDrill for? Software engineers, SREs, QA analysts, technical writers and students who need small utilities during debugging, code review, content checks or API work. Typical moments include inspecting claims in an access token during auth troubleshooting, comparing two UTM links from a marketing sheet, converting an API sample array into a spreadsheet, beautifying a generated query before sharing it in a ticket, checking a regex against a log line, turning a DevTools copy-as-curl into Fetch or Python, previewing markup on mobile widths, or generating a handful of UUIDs for fixtures. Because everything is local, you can use the tools on confidential snippets with less anxiety than pasting into unknown online converters.
The project is maintained as a lightweight static site with English and Portuguese UI strings. Brazilian users can also explore the Portuguese /pt/ area for CPF, CNPJ and related helpers. We expand SEO and help copy so each tool page explains when to use it, how it works and why data stays on-device — useful for humans and for clearer site quality signals. If something is broken, unclear or missing, email brunojfc@gmail.com. Contact, About and Privacy pages are available at /contact/, /about/ and /privacy/ (Portuguese path aliases /sobre/ and /privacidade/ remain available).
Support: brunojfc@gmail.com · Contact