Dev Nestio - DEV Community

Dev Nestio

Jun 30

Browser-based Code Snippet Manager — save, tag, search, syntax highlight, no account

#javascript #tools #webdev #productivity

1 min read

Dev Nestio

Jun 30

Docker Cheatsheet with interactive command builder — 40+ commands, Compose snippets

#docker #devops #tools #javascript

1 min read

Dev Nestio

Jun 30

I built a visual CSP header generator (no more hand-editing Content-Security-Policy)

#webdev #tools #javascript #security

2 min read

Dev Nestio

Jun 30

HTTP Status Code Reference — searchable, with use cases and RFC specs

#webdev #tools #javascript #programming

2 min read

Dev Nestio

Jun 30

I built a browser-based .env File Manager (parse, edit, export to JSON/shell)

#webdev #tools #javascript #programming

1 min read

Dev Nestio

Jun 29

Git Cheatsheet & Command Builder — 60+ commands, searchable, with parameter builder

#git #webdev #tools #programming

1 min read

Dev Nestio

Jun 29

CSS Unit Converter — px, em, rem, vw, vh, %, pt, cm, mm, in all in one tool

#css #webdev #tools #javascript

1 min read

Dev Nestio

Jun 29

I built a browser-based Image Color Picker — HEX, RGB, HSL with magnifier lens

#webdev #tools #javascript #design

1 min read

Dev Nestio

Jun 29

Free Lorem Ipsum Generator with 5 language variants (Latin, Tech, Business, Hipster...)

#webdev #tools #javascript #programming

1 min read

Dev Nestio

Jun 29

I built a free Markdown to HTML Converter that runs entirely in your browser

#webdev #tools #javascript #programming

1 min read

Dev Nestio

Jun 29

API Request Tester — Send GET/POST/PUT/DELETE with Headers & Body Online

#api #webdev #tools #javascript

1 min read

Dev Nestio

Jun 29

SVG Optimizer & Minifier — Remove Comments, Metadata & Whitespace Online

#svg #webdev #tools #javascript

1 min read

Dev Nestio

Jun 29

Unix Permissions Calculator — chmod Numeric ↔ Symbolic in Your Browser

#linux #webdev #tools #javascript

1 min read

Dev Nestio

Jun 29

IP/CIDR Calculator — Subnet, Network, Broadcast & Host Range Instantly

#networking #webdev #tools #javascript

1 min read

Dev Nestio

Jun 29

Text Diff Tool — Side-by-Side & Unified Diff in Your Browser

#webdev #tools #javascript #programming

1

1 min read

Dev Nestio

Jun 29

Number System Converter — Binary, Octal, Decimal, Hex Free Online

#webdev #tools #javascript #programming

1 min read

Dev Nestio

Jun 29

HTML Beautifier & Minifier — Format or Compress HTML Free Online

#webdev #tools #html #javascript

1 min read

Dev Nestio

Jun 29

Color Palette Generator — Complementary, Triadic, Analogous Palettes Free Online

#webdev #tools #javascript #css

1 min read

Dev Nestio

Jun 28

I Built a Browser-Based DNS Lookup Tool — A, AAAA, MX, TXT, SOA, CAA, SRV via DNS-over-HTTPS, 149 Tests

#webdev #javascript #dns #opensource

1

4 min read

Dev Nestio

Jun 28

I Built a Markdown Table Generator in Pure Vanilla JS — Spreadsheet UI, CSV Import, HTML Output, 129 Tests

#webdev #javascript #opensource #tutorial

5

4 min read

Dev Nestio

Jun 28

I Built a Browser-Only Timestamp Converter — Epoch ↔ Date, 30+ Timezones, DST-Aware, 124 Tests

#javascript #webdev #devtools #programming

1

3 min read

Dev Nestio

Jun 28

I Built a Browser-Only HTTP Header Analyzer — Security Scoring, Missing Header Warnings, 147 Tests

#security #webdev #javascript #devtools

1

3 min read

Dev Nestio

Jun 28

I Built a Browser-Only JSON Schema Validator — Draft-07, $ref, allOf/anyOf/oneOf, if/then/else, 173 Tests

#webdev #javascript #json #tooling

1

5 min read

Dev Nestio

Jun 28

I Built a Visual SVG Wave Generator in Pure Vanilla JS — 5 Wave Types, Download SVG/PNG, 162 Tests

#webdev #javascript #css #design

5 min read

Dev Nestio

Jun 28

I Built a Visual CSS Box Shadow Generator — Multi-Layer, Inset, Presets, 125 Tests

#css #javascript #webdev #tools

4 min read

Dev Nestio

Jun 28

I Built a Visual CSS Gradient Generator in Pure Vanilla JS — Linear, Radial & Conic, 150 Tests

#css #javascript #webdev #tools

4 min read

Dev Nestio

Jun 28

I Built a Browser-Only IP / CIDR Calculator — IPv4 & IPv6, Subnet Split, Binary Breakdown (136 Tests)

#networking #javascript #webdev #tools

5 min read

Dev Nestio

Jun 28

I Built a Browser-Only Favicon Generator — Text, Emoji & SVG to ICO/PNG (136 Tests, Zero Dependencies)

#javascript #webdev #tools #favicon

2

1

4 min read

Dev Nestio

Jun 28

I Built a Unit Converter in Pure Vanilla JS — 7 Categories, 70+ Units, 165 Tests, Zero Dependencies

#javascript #webdev #tools #opensource

3 min read

Dev Nestio

Jun 28

I Built a Text Diff Tool in Pure Vanilla JS — Myers Algorithm from Scratch, 129 Tests, Zero Dependencies

#javascript #webdev #tools #opensource

4 min read

Dev Nestio

Jun 27

I Built a Visual Chmod Calculator in Pure Vanilla JS — Checkboxes ↔ Numeric ↔ Symbolic, 222 Tests

#javascript #linux #webdev #devtools

5 min read

Dev Nestio

Jun 27

I Built a Browser-Only HTML Entity Encoder/Decoder — Named, Decimal & Hex, 246 Tests

#javascript #webdev #html #devtools

1

4 min read

Dev Nestio

Jun 27

I Built a Color Picker & Palette Generator in Pure Vanilla JS — No Libraries, 187 Tests

#javascript #webdev #design #devtools

5 min read

Dev Nestio

Jun 27

I Built a QR Code Generator in Pure Vanilla JS — No Libraries, No Server, 202 Tests

#javascript #webdev #devtools #opensource

2

1

5 min read

Dev Nestio

Jun 27

I Built a Browser-Only YAML Formatter & Validator (No Dependencies, Works Offline)

#yaml #devtools #javascript #webdev

2 min read

Dev Nestio

Jun 27

I Built a UUID Generator Using crypto.randomUUID() (Why Math.random() Is the Wrong Choice)

#javascript #webdev #devtools #opensource

3 min read

Dev Nestio

Jun 27

I Built a Real-Time Regex Tester in the Browser (Capture Groups, Flags, No Libraries)

#javascript #webdev #devtools #regex

2 min read

Dev Nestio

Jun 27

I Built a JWT Decoder That Never Sends Your Token to a Server

#javascript #webdev #devtools #security

3 min read

Dev Nestio

Jun 27

I Built a Browser-Only Hash Generator (MD5, SHA-1, SHA-256, SHA-512 — No Server)

#javascript #webdev #devtools #security

3 min read

Dev Nestio

Jun 27

I Built a Bidirectional CSV ↔ JSON Converter With Zero Dependencies (RFC 4180 Compliant)

#javascript #webdev #devtools #opensource

3 min read

Dev Nestio

Jun 17

18 Browser-Only Developer Tools I Built With AI Agents

#webdev #tools #productivity #javascript

8 min read