Tools

Essential web‑based tools to streamline development, design and testing.

Contents

API & Data Tools

Mockoon – A free open‑source tool for spinning up mock REST or GraphQL APIs locally. Helps test front‑end applications without relying on live services.

➜ https://mockoon.com/
Beeceptor – Quickly create a mock API endpoint in the cloud. Great for prototyping and testing webhooks.

➜ https://beeceptor.com/
Postman – Popular API platform for building, testing and documenting APIs. Offers mock servers, collections and collaboration features.

➜ https://www.postman.com/
WireMock Cloud – Flexible service for recording and replaying HTTP traffic; useful for complex API integrations.

➜ https://wiremock.io/
Apiary – Service for API mockup and testing.

➜ https://apiary.io/

JSON Editor Online – Full‑featured online editor for viewing, formatting, validating and converting JSON. Features include tree/table modes, diffing and schema validation.

➜ https://jsoneditoronline.org/
JSONLint – Quick JSON validator and formatter. Paste JSON and see errors instantly.

➜ https://jsonlint.com/
ConvertCSV – Convert CSV to JSON, XML, SQL or vice versa.

➜ https://www.convertcsv.com/
UUID/GUID Generator & Decoder – Generate various UUID/GUID coded, encode/decode & vice versa.

➜ https://uuid-generator.houseoflaigna.com/g/uuidv4

ColorZilla Gradient Editor – Powerful CSS gradient generator with a live preview and the ability to export code.

➜ https://www.colorzilla.com/gradient-editor/
Glassmorphism Generator – Create modern frosted‑glass effects complete with blur, color and opacity settings.

➜ https://hype4.academy/tools/glassmorphism-generator
CSS Grid Generator – Visual tool to craft complex grid layouts and generate clean CSS.

➜ https://cssgrid-generator.netlify.app/
Neumorphism/Soft UI Generator – Quickly build neumorphic buttons, cards and inputs with adjustable light and shadow.

➜ https://neumorphism.io/#generator
CSS3 Generator – Create CSS3 properties with simple options and copy‑ready code.

➜ https://css3generator.com/
CSS3 Playground – Experiment with CSS3 properties interactively and preview results in real‑time.

➜ https://css3.mikeplate.com/
CSS3 Button Generator – Easily create custom CSS3 buttons with gradients and hover effects.

➜ https://css3button.net/
CSS 3.0 Maker – Online generator for CSS3 properties including border‑radius, box‑shadow, gradients, and transitions.

➜ https://css3maker.com/

Favicon.io – Create favicons from text, images or emojis.

➜ https://favicon.io/
RealFaviconGenerator – Generate favicons for all platforms (iOS, Android, desktop) with proper sizing.

➜ https://realfavicongenerator.net/
FavIcon Generator (DynamicDrive) – Simple tool to create favicons from uploaded images.

➜ https://tools.dynamicdrive.com/favicon/

Regex101 – Interactive regex editor with explanation, quick reference and debugging.

➜ https://regex101.com/
String Utilities Online – Perform base64 encoding/decoding, URL encoding, hashing and text conversions.

➜ https://strings.life/

Coolors – Generate and explore modern color palettes with export options for CSS.

➜ https://coolors.co/
Accessible Color Palette Builder – Ensure your color combinations meet WCAG contrast standards.

➜ https://accessible-colors.com/
Gradient Hunt – Curated collection of beautiful gradients for backgrounds and UI elements.

➜ https://gradienthunt.com/

carbon.now.sh – Create beautiful images of your code snippets to share on social media or presentations.

➜ https://carbon.now.sh/
Dillinger – Live Markdown editor with preview and export to PDF/HTML.

➜ https://dillinger.io/
SVGOMG – Compress and optimize SVG files while preserving quality.

➜ https://jakearchibald.github.io/svgomg/
Uptime Robot – Monitor your website’s uptime from multiple locations and receive alerts when it goes down.

➜ https://uptimerobot.com/
Timestamp Converter – Convert UNIX timestamps to human dates and vice versa.

➜ https://www.unixtimestamp.com/

Skyscraper Puzzle Solver – An interactive solver for Skyscraper logic puzzles, helping you find solutions step by step.

➜ https://skyscraper-solver.houseoflaigna.com/
Sudoku & KenKen Puzzle Solver – A versatile solver for Sudoku and KenKen puzzles, supporting various grid sizes and difficulty levels.

➜ https://sudoku-solver.houseoflaigna.com/
NumWorks Calculator – An online version of the NumWorks scientific calculator for quick computations and graphing.

➜ https://calculator.houseoflaigna.com/

Notion – A powerful tool for note‑taking, task management, and team collaboration.

➜ https://alvarlaigna.com/notion/

I’ve put together these GPTs to help you with your projects:

Estonian Public Procurements Assistant – Helps with questions and usage of the Estonian Public Procurements Registry.
GameDev Sidekick – An in‑depth game development mentor with a broad knowledge base.
Marketing Guru – A digital marketing strategist with expertise in design tools, marketing trends, and actionable business insights.
Estonian Business & Employment Law Assistant – Provides professional guidance on Estonian business, contract, tax, and employment law.
CTO Assistant – A focused and precise CTO advisor for technology and business decisions.
Gym Training Coach – A digital coach for gym training, bodyweight exercises, and healthy eating habits.