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Blog🧾 Invoice Generator
Free Tools for Developers & Freelancers

Professional tools that
work in your browser.

GST Invoice Generator, JSON Formatter, JWT Decoder and more. Privacy-first — your data never leaves your device.

🧾 Free GST Invoice GeneratorExplore All Tools
🔒 100% Private⚡ No Signup🎁 Always Free📱 Works on Mobile

All Tools

Built for developers and Indian freelancers. No account needed.

🔥 New
🧾

GST Invoice Generator

Create professional GST-compliant invoices with CGST, SGST, IGST calculations. Download as PDF instantly.

⚡ Popular
📝

JSON Formatter

Format, validate, and beautify JSON data instantly with our powerful in-browser editor.

🔐 Secure
🪪

JWT Decoder

Decode JWT tokens, inspect claims, check expiry, and verify signatures locally in the browser.

🚀 Fast
🔐

Base64 Encoder / Decoder

Encode text, decode Base64, and switch to URL-safe output for query strings and tokens.

✨ Handy
🔄

Format Converter

Auto-detect and convert between JSON, YAML, and escaped strings in one click.

🎯 Career
📄

Resume ATS Checker

Score your resume against ATS rules and match it to a job description — instantly and privately in your browser.

💰 Finance
🏦

EMI Calculator

Monthly EMI for home, car and personal loans. Full amortization schedule, rate comparison.

⚡ Popular
📱

QR Code Generator

Generate QR codes for URLs, UPI payments, WiFi, contact cards and more. Custom colors, PNG & SVG download.

🇮🇳 India
📊

CTC Salary Calculator

Exact in-hand salary from CTC. Old vs new regime, PF, HRA & all deductions. FY 2025-26.

Coming Soon

#️⃣
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes instantly in the browser.
⏱️
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
🔀
JSON Diff Checker
Compare two JSON objects and highlight exactly what changed.
📝
ATS Resume Scanner
AI-powered resume score — find out why your resume is getting rejected.
🔒

100% Private by Design

All processing runs in your browser. Your invoice data, JSON, and tokens are never uploaded to any server.

Instant, No Signup

Open a tool and use it immediately. No account, no email, no credit card — ever for the core features.

🇮🇳

Built for India

GST-compliant invoices with CGST/SGST/IGST, Indian number formatting, ₹ currency, and UPI-ready bank details.

Why Indian freelancers and developers love Devora

Free GST Invoice Generator

Zoho Books costs ₹749/month. Vyapar is desktop-only. Our free GST invoice generator lets you create professional invoices with correct CGST + SGST (intrastate) or IGST (interstate) calculations, bank details, and amount in words — downloadable as PDF in 60 seconds, with zero signup.

Developer Tools That Respect Privacy

Every tool on Devora runs entirely in your browser. That means you can safely paste JWT tokens, API keys, sensitive JSON payloads, and invoice data without worrying about it being logged or stored by a third-party server.

From the blog

Practical guides for Indian freelancers and developers

All articles →
📄GST & Invoicing

How to Send a GST Invoice as a Freelancer

Without hiring a CA — the fields, the tax types, and the common mistakes that get invoices sent back.

📊Tax & Salary

Old Regime vs New Regime 2025-26 — I Did the Math

My colleague Priya lost ₹18,000/year for 3 years by not checking. Here's the calculation that matters.

🏠Loans & Finance

What Nobody Tells You About Home Loans

Month 18 of my loan, only ₹8,000 of my ₹28,400 EMI had gone toward what I owed. The rest was interest.

🧾GST & Invoicing

GST Registration for Freelancers — The Real Answer

When you actually need it, when you don't, and what happens with foreign clients.

Generate your first GST invoice in 60 seconds.

No signup. No payment. Just fill the form and download your PDF.

🧾 Create Invoice Now

Free Developer & Business Tools for India

Devora is a free, browser-based tools platform built for Indian developers, freelancers, and small businesses. Every tool runs entirely in your browser — your data never leaves your device. No login required, no credit card, no subscriptions.

GST Invoice Generator

Create GST-compliant invoices with automatic CGST + SGST (intrastate) or IGST (interstate) calculation. Download as PDF instantly. Choose from 4 professional templates. No watermark, no login. Perfect for Indian freelancers, consultants, designers and small businesses.

CTC to In-Hand Salary Calculator

Convert your CTC to exact monthly take-home salary. Covers PF, Professional Tax, HRA exemption, 80C, 80D and NPS deductions. Compare old regime vs new regime (FY 2025-26 Budget 2025 slabs). Includes Section 87A rebate calculation.

EMI Calculator

Calculate monthly EMI for home loans, car loans, personal loans and education loans. Full month-by-month amortization schedule, year-wise payment summary, and EMI comparison at different interest rates. Preset rates for SBI, HDFC and major Indian banks.

QR Code Generator

Generate QR codes for URLs, UPI payments (Google Pay, PhonePe, Paytm), WiFi credentials, vCard contact cards, plain text, email, phone and SMS. Custom colors, error correction levels, download as PNG or SVG. No watermark, unlimited, free.

JSON Formatter & Validator

Format, validate and beautify JSON instantly. Pretty print with indentation, minify for production, sort keys alphabetically, and get exact error locations with line numbers. 100% browser-based — safe for sensitive API payloads and config files.

JWT Decoder

Decode JWT tokens to inspect header, payload and signature. Check token expiry, view all claims, verify HMAC signatures with a secret key. Supports HS256, RS256 and all standard JWT algorithms. Tokens never leave your browser.

Why Devora?

Most developer tools either require a login, show ads, add watermarks on output, or charge a monthly subscription. Devora is different — every tool is free, runs entirely in your browser (so your data stays private), and has no watermarks or signup walls. Built specifically for the Indian market with INR formatting, GST compliance, Indian salary structures, and UPI payment support. We also offer the most comprehensive free GST invoice generator in India — no software installation required, no monthly fee, and a full PDF download with CGST/SGST/IGST calculations, bank details, and amount in words.