Category · 27 tools

Dev tools

The small utilities that smooth the day: API clients, formatters, generators and playgrounds.

27 shown

Dev tools

Biome

A Rust-based web toolchain providing a fast formatter and linter for JS, TS, JSX, JSON, CSS and GraphQL.

Free
  • formatter
  • linter
  • rust
take

A blazing Rust toolchain that formats and lints in one fast tool, aiming to replace Prettier + ESLint. The performance pick; the ecosystem is younger than what it replaces.

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Dev tools

Bruno

An open-source, Git-native API client that stores collections as plain-text files in your repository.

Freemium
  • api-client
  • open-source
  • git-native
take

A Git-native API client that stores collections as plain-text files in your repo. The pick for teams who want version-controlled, offline, no-cloud API requests.

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Dev tools

Bun

An all-in-one JavaScript and TypeScript runtime, bundler, test runner and package manager in a single binary.

Free
  • runtime
  • package-manager
  • javascript
take

An all-in-one JS/TS runtime, bundler, test runner and package manager in one fast binary. A compelling Node alternative — try it for the speed, mind the edge cases.

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Dev tools

Can I Use

A reference site with up-to-date browser support tables for HTML, CSS, JavaScript and other web tech.

Free
  • browser-support
  • reference
  • web
take

The browser-support tables you check before using a shiny CSS or JS feature. Bookmark it; it settles 'can I actually ship this?' in seconds.

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Dev tools

CodePen

An online code editor and front-end community for writing and sharing live HTML, CSS and JavaScript.

Freemium
  • front-end
  • playground
  • web
take

The front-end playground for quick HTML/CSS/JS demos and sharing. The fastest way to prototype an effect or share a snippet; not for full apps.

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Dev tools

crontab.guru

A quick reference that translates cron schedule expressions into plain English.

Free
  • cron
  • reference
  • scheduling
take

The site that tells you what '0 */6 * * *' actually means before you commit it. Bookmark it; cron syntax never sticks.

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Dev tools

ESLint

A pluggable, configurable linter for finding and reporting problematic patterns in JavaScript and TypeScript.

Free
  • linter
  • javascript
  • open-source
take

The standard JS/TS linter, with a huge rule and plugin ecosystem. Essential for catching bugs and enforcing conventions; flat config is the norm now.

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Dev tools

Hoppscotch

An open-source API development ecosystem for HTTP, GraphQL and realtime protocols across web, desktop and CLI.

Freemium
  • api-client
  • open-source
  • api-testing
take

A fast, open-source, self-hostable API client across web, desktop and CLI. The lightweight Postman alternative when you want speed and no account.

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Dev tools

Insomnia

An open-source API client for REST, GraphQL, gRPC, WebSockets and SSE, maintained by Kong.

Freemium
  • api-client
  • api-testing
  • open-source
take

A cleaner, open-source API client for REST, GraphQL and gRPC. A lighter Postman alternative — though a past forced-login move pushed some to Bruno.

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Dev tools

JSON Crack

A tool that visualises JSON, YAML and other data formats as interactive node graphs.

Freemium
  • json
  • visualization
  • data
take

Paste JSON and see it as an interactive graph — a fast way to understand a gnarly API response. Handy whenever nested JSON stops making sense in your head.

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Dev tools

Nx

A smart, extensible build system and monorepo toolkit with generators and caching.

Freemium
  • monorepo
  • build-system
  • tooling
take

A more powerful, more opinionated monorepo toolkit — generators, a project graph, distributed caching. Worth it for large multi-team repos; heavier than Turborepo for small ones.

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Dev tools

Playwright

Microsoft's framework for reliable end-to-end browser testing across Chromium, Firefox and WebKit.

Free
  • testing
  • e2e
  • browser
take

Microsoft's end-to-end browser testing — reliable, fast, cross-browser, with great tooling. The serious choice for testing real user flows.

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Dev tools

pnpm

A fast, disk-space-efficient Node.js package manager using a content-addressable store and hard links.

Free
  • package-manager
  • nodejs
  • open-source
take

A fast, disk-efficient package manager with a strict, correct node_modules layout and great monorepo support. The quiet upgrade over npm you won't go back from.

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Dev tools

Postman

A collaborative API platform for designing, building, testing and documenting APIs.

Freemium
  • api-client
  • api-testing
  • collaboration
take

The heavyweight API platform — design, test, document, mock, collaborate. Powerful but cloud-account-heavy; some find it more than they need.

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Dev tools

Prettier

An opinionated code formatter that reprints source code to a consistent style across many languages.

Free
  • code-formatter
  • javascript
  • open-source
take

The opinionated formatter that ended style debates — run it on save and forget. Boring in the best way; just turn it on.

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Dev tools

ray.so

A tool for turning code snippets into beautiful images for sharing.

Free
  • code-images
  • sharing
  • snippets
take

Turn a code snippet into a pretty image for a post or slide, in seconds. The polished way to share code that isn't an ugly screenshot.

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Dev tools

regex101

An online regular expression tester and debugger that explains patterns across many regex flavours.

Free
  • regex
  • testing
  • debugger
take

The regex tester with a live explanation panel across every flavour. The reference I open whenever a regex misbehaves.

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Dev tools

Responsively

An open-source browser that previews a site across many device sizes at once.

Free
  • responsive
  • testing
  • browser
take

See your site at a dozen screen sizes side by side, scrolling in sync. A real time-saver when you're chasing responsive bugs.

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Dev tools

Squoosh

A browser-based image compression and format-conversion tool by Google.

Free
  • image-optimization
  • compression
  • webp
take

Compress and convert images in the browser with a live before/after — no app, no upload. The quick fix for that 4MB hero photo killing your load time.

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Dev tools

StackBlitz

An online IDE that runs Node.js natively in the browser via WebContainers for instant dev environments.

Freemium
  • online-ide
  • webcontainers
  • cloud-dev
take

Full Node dev environments in the browser via WebContainers — no local setup. Brilliant for reproductions, demos and trying a framework instantly.

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Dev tools

Storybook

A workshop for building, testing and documenting UI components in isolation.

Free
  • components
  • documentation
  • testing
take

Build and document components in isolation, away from your app — the standard for a real component library or design system. Some setup, big payoff for teams.

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Dev tools

SVGOMG

A web GUI for SVGO that optimises and shrinks SVG files.

Free
  • svg
  • optimization
  • web-tool
take

Drop in an SVG and watch it shed bloat — the friendly UI for SVGO. A two-second habit that keeps your icons and illustrations lean.

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Dev tools

Transform.tools

A web app that converts between many data and code formats — JSON, TypeScript, schemas and more.

Free
  • converter
  • json
  • utility
take

Paste anything — JSON, a type, an object — and convert it between formats instantly. The Swiss-army knife for 'turn this into that' chores.

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Dev tools

Turborepo

A high-performance build system for JavaScript and TypeScript monorepos, by Vercel.

Free
  • monorepo
  • build-system
  • caching
take

Makes monorepo builds fast by caching everything it can, locally and in CI. The pick when your repo grows several packages and builds start to drag.

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Dev tools

Vite

A frontend build tool with a fast dev server using native ES modules and a bundled production build.

Free
  • build-tool
  • bundler
  • frontend
take

The fast build tool and dev server under most modern frameworks, and the React team's CRA replacement. If you're starting a frontend project, you're probably already using it.

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Dev tools

Vitest

A fast, Vite-native unit test framework with a Jest-compatible API.

Free
  • testing
  • vite
  • javascript
take

A fast, Vite-native test runner with a Jest-compatible API. The default for testing modern frontend projects; instant, ESM-friendly, near-zero config to start.

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Dev tools

Warp

A modern terminal with built-in AI agents for natural-language command generation and agentic workflows.

Freemium
  • terminal
  • coding-agent
  • cli
take

A modern terminal with built-in AI agents for generating commands and running workflows. A genuinely nicer terminal — the AI is a bonus, the UX is the draw.

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