Developer Tools

💻 Developer
Toolbox

JSON, encoding, CSS, DevOps & India-specific tools.
All client-side — zero data sent to any server.

⚡ 35 Live🚀 1 Coming Soon🔒 100% Client-Side

calcnation.dev

$ calcnation --tools developer

✓ JSON Formatter LIVE

✓ Base64 Encoder LIVE

✓ JWT Decoder LIVE

◌ Hash Generator SOON

◌ PAN Validator SOON

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💻 All Developer Tools

⚡ 35 live🔜 1 coming

Format, validate & minify JSON with syntax highlighting.

Compare two JSON objects side-by-side. Spot added, removed & changed keys instantly.

JSON to TypeScript

Convert JSON to TypeScript interfaces automatically. Handles nested objects & arrays.

Convert JSON array to CSV format. Download as .csv file instantly.

Convert JSON to YAML and YAML to JSON. Clean output, copy in one click.

Decode JWT tokens — header, payload, claims, expiry countdown & security warnings.

Base64 Encoder/Decoder

Encode & decode Base64 online. Text, image, file — URL-safe mode, auto-detect, live image preview.

URL Encode/Decode

URL encode & decode online. encodeURIComponent · encodeURI · RFC 3986 — query params table, URL builder, batch mode, diff view.

MD5, SHA-1, SHA-256, SHA-512 simultaneously. HMAC mode, file hashing, compare, batch.

Live Unix counter · Unix ↔ Human · IST/UTC · Batch convert · Timestamp diff · 12 formats.

Convert cURL to fetch, axios, Python, Go, PHP, Ruby, HTTPie & Postman. 10 samples, pretty print, share URL.

Dockerfile Generator

Visual Dockerfile builder. Multi-stage, ENV vars, healthcheck, linter, .dockerignore & AI explain.

Box Shadow Generator

Multi-layer box shadows. Neon, Neumorphic, Soft presets. Tailwind, CSS variable output. Live preview on card/button/circle.

HEX/RGB/HSL/OKLCH/HWB all formats. Shades, tints, palette, harmony, gradient, WCAG contrast. Image color picker.

Meta Tag Generator

SEO + OG + Twitter Card meta tags. Live Google SERP, Facebook, Twitter, WhatsApp previews. Character counters, 6 presets.

Visual cron builder + raw editor. Human text, next 20 runs, 24h timeline, code export for 5 platforms.

AES Encrypt / Decrypt

AES-128/192/256 encryption with GCM, CBC, CTR modes. PBKDF2 key derivation. 100% browser-side.

HMAC-SHA256, SHA-512 signatures. Webhook verify, API auth, batch, code snippets.

Bcrypt Generator

Hash & verify passwords with bcrypt. Cost 8-18, strength meter, benchmark, batch.

Test regex live with match highlights, groups, replace mode, unit tests, AI explanation.

Code Diff Checker

Side-by-side diff with char-level highlight, AI summary, merge mode, git export, timeline.

Code Diff Checker

Side-by-side diff · Char-level · AI summary · Merge · Timeline · Git export

Beautify, validate & preview HTML. Accessibility audit, SEO check, HTML→JSX/React/Vue.

Format, minify & validate SQL. Auto-detect dialect, AI explain & optimize, code snippet generator.

HTML → Markdown

Convert HTML to clean Markdown. Tables, code blocks, GitHub flavored.

Lorem Ipsum Generator

Generate placeholder text. Paragraphs, sentences, words or bytes. HTML, Markdown, JSON output.

Generate SEO-friendly URL slugs. Stop word removal, SEO score, bulk mode, AI suggestions.

Generate v1, v4, v6, v7 UUIDs in bulk. Validate, inspect & decode any UUID version. Export as JSON, CSV, SQL, TypeScript.

Password Generator

Generate strong passwords, passphrases, diceware & PINs with entropy analysis.

Parse any URL into protocol, host, path, query params, and fragment — live breakdown, encoder/decoder, cURL generator and diff.

.gitignore Generator

Generate .gitignore files for 50+ stacks — Node, Python, React, Go, Docker and more.

QR Code Generator

Generate QR codes for URL, WiFi, UPI Payment, vCard, Email, SMS, WhatsApp, GPS. Logo embed, SVG export, batch generate, decode.

README Generator

Generate professional GitHub README.md with live preview. 7 templates, badge builder, tech stack, GitHub stats, lint warnings.

Linear, radial & conic gradients. Angle wheel, 12 presets, Tailwind, animated CSS, CSS variable, export PNG.

HTTP Status Reference

All HTTP status codes with descriptions, use-cases, code snippets, live cURL tester, and favorites. Search, filter, copy as TypeScript enum.

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🔜 Soon

Contrast Checker

WCAG A / AA / AAA accessibility contrast ratio checker.