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Dev Nestio

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Joined on Jun 17, 2026

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

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

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

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

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