Tool directory
One task, one focused page.
Choose a developer workflow. Pages are pre-rendered for discovery; processing happens locally after they load.
DevSexy for macOS
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Keep all 35 tools close with keyboard shortcuts, offline access, and local processing on your Mac.
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Start with a concrete task
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.
Try a complete developer task
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.
Data & formats
JSON Formatter & Validator
Format, validate, minify, inspect, and query JSON with precise syntax diagnostics.
Example · Format a strict JSON payload
YAML & TOML Configuration Studio
Format and translate configuration data while exposing type and comment-loss boundaries.
Example · Keep a leading-zero code as text
XML Studio
Format XML, diagnose well-formedness, inspect namespaces, and test XPath expressions.
Example · Check XML syntax without a schema
Table Data Bridge
Convert CSV, TSV, JSON records, and Markdown tables without leaving the browser.
Example · Keep an identifier and a quoted comma
JSON Schema & OpenAPI Studio
Validate instances against JSON Schema and inspect OpenAPI 3.1 structure.
Example · Validate a required string property
QR & Barcode Studio
Generate and inspect QR codes and Code 128 barcodes locally.
Example · Encode a URL as a QR symbol
Base64 Text
Encode and decode UTF-8 text with standard and URL-safe Base64 variants.
Example · Encode two Chinese characters
Web engineering
HTML Beautifier & Minifier
Reshape HTML with a parser-aware formatter and inspect malformed structure.
Example · Indent a semantic fragment
HAR & HTTP Session Inspector
Inspect request waterfalls and redact sensitive HTTP archive fields locally.
Example · Summarize one recorded request
cURL & HTTP Message Studio
Inspect cURL commands and translate requests into clear client code.
Example · Inspect a request with a demo credential
SCSS Formatter
Format nested Sass syntax into a stable, reviewable structure.
Example · Indent a nested hover rule
LESS Formatter
Format LESS variables, mixins, nesting, and rules without compiling.
Example · Format a Less variable and hover rule
Color Space Converter
Convert modern CSS colors and check readable contrast across spaces.
Example · Convert opaque red
CSS Beautifier & Minifier
Format, diagnose, and minify CSS with syntax-aware processing.
Example · Indent a grid rule
JavaScript Beautifier & Minifier
Format or compress JavaScript with parser-backed diagnostics.
Example · Format a user object
SVG Optimizer
Reduce SVG markup with transparent optimization decisions.
Example · Remove a comment while keeping the viewBox
TypeScript & TSX Formatter
Format TypeScript and TSX using the same parser family as modern editor workflows.
Example · Format an interface and typed object
HTML/SVG to JSX/TSX
Convert markup attributes and component structure for React codebases.
Example · Convert class and for attributes
URL Inspector & Query Editor
Separate, edit, encode, and rebuild every URL component.
Example · Keep duplicate keys and distinguish plus from space
Security
JWT Debugger
Decode, verify, and sign JSON Web Tokens while keeping keys in the browser.
Example · Read claims without trusting the signature
Hash, HMAC & Checksum Studio
Calculate and verify digests for text and files with streaming workers.
Example · Hash exactly three UTF-8 bytes
X.509 Certificate & PEM Inspector
Decode certificates, SANs, key usage, and validity without sending private material away.
Example · Check the demonstration DNS name
Text
RegExp Tester
Test JavaScript regular expressions with groups, indices, and replacement output.
Example · Find two named capture pairs
Text Escapes & Unicode Inspector
Inspect code points, normalization, graphemes, and language escape sequences.
Example · Compose an accent with NFC
Text Diff
Compare two texts by line, word, or character in a local worker.
Example · Review a configuration change by line
Mobile
Mobile Build Artifact Inspector
Inspect IPA, APK, and AAB metadata without uploading a release build.
Example · Inspect a synthetic archive
Apple Property List Studio
Read XML and binary property lists, inspect types, and export structured data.
Example · Inspect bundle identity and a boolean
Localization Resource Bridge
Compare and translate Apple, Android, XLIFF, and ARB localization resources.
Example · Convert one strings entry to JSON
App Link Association Studio
Build and simulate Apple AASA and Android assetlinks routing rules.
Example · Match a product route
Android Vector Asset Bridge
Convert compatible SVG paths to Android VectorDrawable and back.
Example · Convert a basic SVG path
Systems
Environment Matrix
Compare .env files, find missing keys, and create safe example files.
Example · Compare configuration keys
Cron & RRULE Explorer
Explain schedules, calculate future runs, and compare cron with iCalendar recurrence.
Example · Preview five weekday cron runs
Number Base & Byte Inspector
Translate integer bases, signed widths, byte order, and floating-point bits.
Example · Read FF as signed eight-bit data
UUID & ULID Identifier Studio
Generate, normalize, and inspect modern sortable identifiers.
Example · Generate a deterministic UUIDv5
Unix Time Converter
Convert epochs and ISO dates with explicit units and timezone context.
Example · Convert epoch seconds to UTC
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.