Make developer tools sexy again.
Thirty-five private tools for JSON, JWTs, certificates, text, code, and data. Everything runs locally in your browser. No uploads. Ever.
Find syntax errors, inspect nested values, or explicitly enable JSONC for configuration with comments.
Review whole lines first, then use characters for punctuation or invisible differences.
Convert a known instant and preserve the remainder of a numeric nanosecond timestamp.
Keep repeated keys and distinguish spaces, literal plus signs, and relative links.
Compare readable claims with explicit algorithm, key, issuer, audience, and clock checks.
For repeated local work, open the Mac app with Option shortcuts and keep using the tools offline.
Format and translate configuration data while exposing type and comment-loss boundaries.
Convert CSV, TSV, JSON records, and Markdown tables without leaving the browser.
Inspect cURL commands and translate requests into clear client code.
Test JavaScript regular expressions with groups, indices, and replacement output.
Inspect IPA, APK, and AAB metadata without uploading a release build.
Calculate and verify digests for text and files with streaming workers.
Use the native app for repeated offline work and direct Option shortcuts.
35 · Tools
Local tools. No account.
Suggested tools
JSON Formatter & ValidatorFormat, validate, minify, inspect, and query JSON with precise syntax diagnostics.⌥JJWT DebuggerDecode, verify, and sign JSON Web Tokens while keeping keys in the browser.⌥WText DiffCompare two texts by line, word, or character in a local worker.⌥DHTML/SVG to JSX/TSXConvert markup attributes and component structure for React codebases.⌥XExplore by category
1 { 2 "name": "DevSexy", 3 "private": true, 4 "tools": 35 5 }
1 { 2 "name": "DevSexy", 3 "private": true, 4 "tools": 35 5 }
Developer tools touch our work every day. They should be precise, fast, and invisible—not clumsy, noisy, or unsettling.
DevSexy is an editorial collection of tools designed for focus. Every interaction is built to get out of your way—so you can stay in the flow.
Local-first. Fast. No accounts.
Tool execution happens in your browser. Your tool inputs are not sent through an upload or server-processing step.
Local tool processing. No account required. Your inputs stay in the workbench.
Private by design. Always.
6 · Workflows
Format, validate, query, minify, and diff structured data.
View tools 7Decode tokens, inspect certificates, and audit payloads.
View tools 3Inspect URLs, headers, domains, markup, and requests.
View tools 12Test regex, compare text, count, wrap, and normalize.
View tools 3Convert app resources and inspect mobile build artifacts.
View tools 5Convert time, identifiers, byte layouts, and schedules.
View tools 51Input
Paste, type, or drop your data.
{ "name": "DevSexy" }2Worker
Your browser runs the tool. Nothing leaves your device.
100%
3Result
Get instant results. Copy, save, or export.
No. Tool execution happens locally in your browser, and your input is never part of an upload step.
No account, sign-in, or setup is required. Open a tool and start working.
Yes. All 35 browser tools are available without a paywall.
Once a tool page and its assets are loaded, its processing path does not need a server.
Each tool uses explicit parsers or standards-aware libraries and is covered by repeatable catalog and workflow tests.