The Developer's Ultimate Toolbox

Whether you are debugging a flaky API response, generating types for a new SDK, importing a spreadsheet into your database, or untangling a messy config file, structured-data tools sit at the centre of nearly every workflow. The six utilities below cover JSON, CSV, YAML and SQL — the four formats you will touch every single day. Every one of them parses, validates and transforms strictly in your browser, so you can paste a payload that contains an API key or production data without worrying about it ever being uploaded.

• JSON Formatter

  Beautify, minify and validate JSON with inline syntax-error highlighting.

• JSON to TypeScript

  Generate strongly-typed TypeScript interfaces from any JSON sample.

• JSON to CSV

  Flatten arrays of JSON objects into a CSV ready for Excel or Sheets.

• CSV ↔ JSON

  Two-way conversion between CSV rows and JSON arrays in one click.

• YAML ↔ JSON

  Switch between YAML and JSON for Kubernetes, GitHub Actions and config files.

• SQL to JSON

  Parse INSERT statements and dump rows into structured JSON.

Encoding utilities and lightweight crypto are the duct tape of modern web work — you reach for them when wiring up auth, debugging headers, hashing a file for integrity checks, or sharing a one-time secret with a teammate. Because they often handle credentials, tokens and personally identifiable data, doing the work in-browser is not just nice-to-have — it is the only sensible default. The six tools below run entirely on your device using the Web Crypto API, so private keys and tokens never travel to a server.

• Base64 Encoder/Decoder

  Encode strings or files to Base64 and back without truncation.

• URL Encoder / Decoder

  Percent-encode query parameters, paths and form payloads safely.

• Hash Generator

  Compute MD5, SHA-1, SHA-256 and SHA-512 for text or files.

• Text Encryptor

  AES-encrypt sensitive notes with a passphrase you never share.

• JWT Decoder

  Inspect JWT header, payload and expiry without leaking the token.

• TOTP Generator

  Generate RFC-6238 one-time codes from a secret for testing 2FA flows.

These are the small, sharp tools you reach for ten times a day — the ones you would normally Google, paste into a sketchy site, and immediately regret. From understanding a cron expression at 2 AM, to parsing a copy-pasted curl command from your colleague's terminal, to validating that an .env file has every key your service expects, this group quietly removes dozens of micro-frustrations from your day. Each one runs locally and respects sensitive inputs like log lines and API URLs.

• Regex Tester

  Test patterns live with capture-group highlighting and explanations.

• Cron Explainer

  Translate cron syntax into plain English (and the next 5 run times).

• UUID Generator

  Generate v1, v4 and v7 UUIDs in bulk, ready to paste into seed scripts.

• Timestamp Converter

  Convert Unix epoch ↔ ISO 8601 ↔ human dates across time zones.

• Number Base Converter

  Switch numbers between binary, octal, decimal and hex instantly.

• Slug Generator

  Turn any title into a clean, URL-safe slug — Arabic & RTL aware.

• Curl Parser

  Paste a curl command and read it as a structured request breakdown.

• Env Validator

  Compare two .env files and surface missing or extra keys per environment.

• Log Analyzer

  Filter, count and group log lines without uploading them to a SaaS.

Front-end and full-stack developers constantly drift into design territory — picking a brand colour, generating a CSS gradient, checking that a button still passes WCAG contrast, or copying a perfect box-shadow. These five tools cover the most common visual decisions you make in a workday, all rendered live with copy-paste-ready CSS output.

• Color Picker

  Pick any colour and copy it as HEX, RGB, HSL or OKLCH.

• Box Shadow Generator

  Build layered CSS box-shadows with live preview and copy-ready code.

• Gradient Maker

  Design linear, radial and conic gradients with unlimited stops.

• Color Converter

  Convert between HEX, RGB, HSL, HSV, CMYK and named CSS colours.

• Contrast Checker

  Score any foreground/background pair against WCAG 2.1 AA & AAA.