Tool directory
One task, one focused page.
Choose a developer workflow. Pages are pre-rendered for discovery; processing happens locally after they load.
Data & formats
JSON Formatter & Validator
Format, validate, minify, inspect, and query JSON with precise syntax diagnostics.
YAML & TOML Configuration Studio
Format and translate configuration data while exposing type and comment-loss boundaries.
XML Studio
Format XML, diagnose well-formedness, inspect namespaces, and test XPath expressions.
Table Data Bridge
Convert CSV, TSV, JSON records, and Markdown tables without leaving the browser.
JSON Schema & OpenAPI Studio
Validate instances against JSON Schema and inspect OpenAPI 3.1 structure.
QR & Barcode Studio
Generate and inspect QR codes and Code 128 barcodes locally.
Base64 Text
Encode and decode UTF-8 text with standard and URL-safe Base64 variants.
Web engineering
HTML Beautifier & Minifier
Reshape HTML with a parser-aware formatter and inspect malformed structure.
HAR & HTTP Session Inspector
Inspect request waterfalls and redact sensitive HTTP archive fields locally.
cURL & HTTP Message Studio
Inspect cURL commands and translate requests into clear client code.
SCSS Formatter
Format nested Sass syntax into a stable, reviewable structure.
LESS Formatter
Format LESS variables, mixins, nesting, and rules without compiling.
Color Space Converter
Convert modern CSS colors and check readable contrast across spaces.
CSS Beautifier & Minifier
Format, diagnose, and minify CSS with syntax-aware processing.
JavaScript Beautifier & Minifier
Format or compress JavaScript with parser-backed diagnostics.
SVG Optimizer
Reduce SVG markup with transparent optimization decisions.
TypeScript & TSX Formatter
Format TypeScript and TSX using the same parser family as modern editor workflows.
HTML/SVG to JSX/TSX
Convert markup attributes and component structure for React codebases.
URL Inspector & Query Editor
Separate, edit, encode, and rebuild every URL component.
Security
JWT Debugger
Decode, verify, and sign JSON Web Tokens while keeping keys in the browser.
Hash, HMAC & Checksum Studio
Calculate and verify digests for text and files with streaming workers.
X.509 Certificate & PEM Inspector
Decode certificates, SANs, key usage, and validity without sending private material away.
Text
Mobile
Mobile Build Artifact Inspector
Inspect IPA, APK, and AAB metadata without uploading a release build.
Apple Property List Studio
Read XML and binary property lists, inspect types, and export structured data.
Localization Resource Bridge
Compare and translate Apple, Android, XLIFF, and ARB localization resources.
App Link Association Studio
Build and simulate Apple AASA and Android assetlinks routing rules.
Android Vector Asset Bridge
Convert compatible SVG paths to Android VectorDrawable and back.
Systems
Environment Matrix
Compare .env files, find missing keys, and create safe example files.
Cron & RRULE Explorer
Explain schedules, calculate future runs, and compare cron with iCalendar recurrence.
Number Base & Byte Inspector
Translate integer bases, signed widths, byte order, and floating-point bits.
UUID & ULID Identifier Studio
Generate, normalize, and inspect modern sortable identifiers.
Unix Time Converter
Convert epochs and ISO dates with explicit units and timezone context.
Direct answer
What is DevSexy?
Browse 35 private online developer tools for JSON, code, security, text, mobile, web, and systems work. Every tool processes input locally in your browser.
Developer tools FAQ
- What developer tools are available on DevSexy?
- DevSexy provides 35 focused tools across data formats, web engineering, security, text, mobile, and systems workflows.
- Do DevSexy tools upload pasted text or files?
- No. Tool execution runs in the browser, without an account, paste URL, or server-processing step.
- Are DevSexy tools free to use?
- Yes. Every tool in this directory is available without a paywall or sign-in.