Catalog of everyday dev utilities
Online Developer Tools for JSON, Regex, JWT, Base64, Cron, UUID and Hash.
28 browser tools in 6 groups: data formatting, tokens, generators, web utilities, request debugging and text work.
28
tools
6
groups
1
click to a tool
{ "suite": "DevToolGrid", "tools": 28, "groups": 6, "mode": "browser-first" }
Data
JSON, YAML, SQL
Security
JWT, Hash, Password
Generators
UUID, QR, Mock data
Web
URL, HTML, MIME
Request
Headers, UA, URL parse
Text & Design
Regex, Case, Color
Scenario map
A catalog of dev tools for formatting, validation, decoding and debugging.
This block shows not just a list of links but real situations: what came in, which group of tools to open, and what result to take back into your workflow.
28
tools
from JSON to word count
6
groups
by working scenario
1
clicks
to the right page
Security & JWT tools
4Token parsing, signature checks, hashes and temporary secrets.
Web encoding tools
4Encoding, references and data types for web interfaces.
Request debugging tools
3Diagnosing URLs, headers and browser context from logs or requests.
Popular online tools for developers
The cards briefly explain each purpose. The working interface opens on the tool's own page.
JSON formatter/validator
Format, minify, and validate JSON without extra steps.
{ valid: true }
Regex tester
Test regular expressions, flags, and matched results.
/dev\w*/gi
Base64 encode/decode
Encode text to Base64 and decode it back to readable form.
SGVsbG8=
JWT decoder
Parse a token's header and payload without secret validation.
header.payload.sig
Cron generator
Build cron expressions from presets and manual fields.
0 9 * * 1
Diff checker
Compare two texts line by line and highlight the changes.
+ changed line
UUID generator
Generate UUID v4 values for test data, keys, and mocks.
crypto.randomUUID()
Hash generator
Compute SHA-1, SHA-256, SHA-384, and SHA-512 for text.
digest.hex()
URL encoder/decoder
Encode and decode URLs, query params, and redirect links.
q=dev%20tools
URL parser
Break a URL into protocol, host, path, query params, and hash.
host + query params
Timestamp converter
Convert Unix timestamps to dates and back, respecting local time.
1717243200
JSON ↔ YAML converter
Convert JSON to YAML and YAML to JSON for configs and API examples.
name: DevToolGrid
CSV ↔ JSON converter
Convert CSV to JSON and JSON to CSV for tables and data exports.
name,email,role
JSON path tester
Test a path in nested JSON and show the resolved value.
user.profile.email
YAML formatter/validator
Validate YAML and format the structure with correct indentation.
valid YAML
HTML entity encode/decode
Encode and decode HTML entities for templates, email, and content.
<div>
Color converter
Convert HEX, RGB, and HSL and show basic color information.
#0891b2
Lorem/mock data generator
Generate lorem text, names, emails, and JSON mocks for tests.
{ users: 5 }
Case converter
Convert text to camelCase, snake_case, kebab-case, PascalCase, and Title Case.
dev_tools
Word counter
Count words, characters, lines, and estimated reading time.
128 words / 6 lines
SQL formatter
Format SQL queries for reading, review, and debugging.
SELECT * FROM users
User-agent parser
Parse a user agent into browser, OS, device, and engine.
Chrome / macOS
HTTP headers parser
Turn raw HTTP headers into a structured key/value list.
content-type: json
HTTP status code reference
A quick reference of HTTP status codes with meaning and category.
422 Unprocessable Content
MIME type lookup
Look up a MIME type by file extension or vice versa.
.json -> application/json
Password generator
Generate passwords with adjustable length, symbols, and readability.
entropy-ready
QR code generator
Generate a QR code for a URL, text, or short payload.
data:image/png
JWT validator
Verify an HS256 JWT signature against a secret and show the result.
HS256 valid
Crossout
Free-to-play vehicle combat MMO
Developer tools
Online developer tools for formatting, validation, decoding and data generation.
DevToolGrid brings together 28 browser-first utilities for everyday tasks: JSON formatter, CSV converter, JSON path tester, regex tester, Base64 encode/decode, JWT decoder, JWT validator, cron generator, diff checker, UUID generator, hash generator, URL parser, HTTP headers parser, MIME lookup, word counter and several more practical tools for working with text, requests and configs.
The site is useful for API debugging, frontend copy checks, data shaping, security inspection and quick payload checks without third-party services. Each tool has its own page with its own working interface, so it is easy to bookmark, share with your team, or open directly from the home page.
Focus
Data, request, text
Access
One URL per tool
Mode
Browser-first, local processing
What it covers
28
tools
from JSON to word count
6
groups
by working scenario
1
clicks
to the right page
How the developer tools catalog is organized
This is not a landing page but a practical catalog. The home page gives an overview of 28 tools, and all the work happens on dedicated pages without switching between services.
Workflow
The user opens the home page, picks a group and goes to a tool's own page.
Structure
Each tool has its own slug, its own H1 and a separate workspace.
Security
JWT, hash, password and headers stay in the browser-first model with no server-side data processing.
Text
Regex, word count, case conversion, Base64 and color tools cover small everyday tasks.