Free Tools by SevenStack

Built to Last,
Free Forever.

36 production-grade tools built with the same engineering standards we apply to every client project. No signup, no cost, no ads.

36
Free Tools
₹0
Cost
100%
In-Browser
∞
Uses
Financial Calculators

Smart
Money Tools

From loan planning to investment projections — six tools to help you make better financial decisions with confidence.

EMI Calculator
Calculate monthly EMI, total interest and full amortization schedule for home loans, car loans and personal loans.
Open Calculator →
SIP Calculator
Project mutual fund returns with compound interest. Add lump sum investments and see year-by-year wealth growth.
Open Calculator →
Loan Pre-closer
Find exactly how much you save by pre-closing your loan and calculate the optimal time for pre-payment.
Open Calculator →
Part Payment
Simulate advance EMI payments to see exactly how many months you save and how much interest you reduce.
Open Calculator →
GST Calculator
Add or remove GST instantly. Supports all tax slabs (5%, 12%, 18%, 28%) with CGST/SGST breakdown for each transaction.
Calculate GST →
FD Calculator
Calculate Fixed Deposit maturity with compound interest. Compare quarterly, monthly and annual compounding returns.
Calculate FD →
Health & Wellness

Know Your
Numbers

Simple health calculators that help you understand your body metrics and track important dates.

BMI Calculator
Calculate your Body Mass Index for metric or imperial measurements. Includes a visual scale and health category indicator.
Calculate BMI →
Age Calculator
Calculate your exact age in years, months and days. Also shows total days lived, weeks, and days until your next birthday.
Calculate Age →
General Utilities

Everyday
Math & Conversion

Handy tools for quick calculations you need every day — from percentages to unit conversions.

Percentage Calculator
Three modes: find a percentage of any number, calculate what percent X is of Y, or compute percentage change between values.
Open Calculator →
Unit Converter
Convert length, weight, temperature, area, volume and speed — 40+ units with instant results and a full reference table.
Open Converter →
Image Tools

Browser-Based
Image Editing

Professional image tools that run entirely in your browser. No file uploads, no privacy concerns, no cost.

Image Editor
Crop, resize, rotate, adjust brightness and contrast — entirely in your browser. Your images never leave your device.
Open Editor →
Image Compressor
Compress JPEG, PNG and WebP images by up to 90% without visible quality loss — perfect for web and social media.
Open Compressor →
Text & Dev Tools

Writing &
Security Tools

Boost your productivity with tools for writers, developers and anyone who cares about online security.

Word Counter
Count words, characters, sentences and paragraphs in real time. Includes reading time and speaking time estimates.
Count Words →
Password Generator
Cryptographically secure passwords using your browser's crypto API. Customize length and character sets. Never sent to any server.
Generate Password →
Productivity Tools

Career & Media
Tools

Professional tools to help you land your next role and manage media — all free, no signup required.

Resume Builder
Live preview resume builder with 6 templates, custom accent colors and one-click PDF export. No signup, no watermarks.
Build Resume →
YouTube Downloader
Download YouTube videos up to 1080p HD or extract MP3 audio. Supports Shorts and playlists — no registration, no ads.
Download Video →
PDF Tools

Create, Merge,
Split & Convert

A complete browser-based PDF toolkit. Create, merge, split, compress, convert to images, and build PDFs from images — nothing uploaded to any server.

PDF Generator
Type or paste content, choose font size, layout and orientation — download a clean PDF instantly.
Create PDF →
PDF Merger
Drag and drop multiple PDFs, reorder them, then merge into a single file with page count preview.
Merge PDFs →
PDF Editor
Add watermarks, page numbers, rotate pages, or extract a page range into a new PDF file.
Edit PDF →
PDF Compressor
Reduce PDF file size by removing metadata and optimising document structure. Fast, private, browser-based.
Compress PDF →
Split PDF
Split a PDF into individual pages or custom page ranges. Download each part as a separate file.
Split PDF →
Image to PDF
Convert JPG, PNG or WebP images into a single PDF. Add multiple images and reorder before converting.
Convert to PDF →
PDF to Image
Convert each PDF page to a PNG or JPEG image. Preview all pages and download individually or all at once.
Convert to Image →
Image Converters

Convert &
Transform Images

Convert between image formats instantly in your browser. JPG ↔ PNG, Images to PDF — no upload, no quality loss, completely free.

JPG to PNG
Convert JPEG images to lossless PNG format. Preserves full quality and supports transparency — instant, browser-based.
Convert to PNG →
PNG to JPG
Convert PNG to JPEG with custom quality control. Transparent areas filled with white. Smaller file size for web use.
Convert to JPG →
QR Code Generator
Generate QR codes for URLs, text, email or WiFi. Custom colours, sizes and error correction. Download as PNG instantly.
Generate QR Code →
Developer Tools

Dev &
Utilities

Essential tools for developers — validate JSON, encode/decode data, generate UUIDs and convert URLs. All run entirely in your browser.

JSON Validator
Validate, format and minify JSON instantly. Highlights errors with line numbers, shows key count and compressed size.
Validate JSON →
Base64 Encoder / Decoder
Encode plain text to Base64 or decode Base64 back to text. Supports standard and URL-safe variants with one-click swap.
Open Tool →
URL Encoder / Decoder
Percent-encode or decode URL components and query strings. Includes a reference table of common URL-encoded characters.
Encode URL →
UUID / GUID Generator
Generate cryptographically random UUID v4 identifiers. Bulk generation up to 50 UUIDs with uppercase and no-dash format options.
Generate UUIDs →
Finance & Business

Money &
Business Tools

Currency conversion, professional invoicing and productivity tools for freelancers and businesses.

Currency Converter
Convert between 30+ world currencies with mid-market reference rates. Includes a quick-reference conversion table.
Convert Currency →
Invoice Generator
Create professional invoices with line items, taxes and discounts. Live preview with print-to-PDF. No signup, no watermarks.
Create Invoice →
AI Email Writer
Generate professional emails in seconds — cold outreach, follow-ups, apologies, job applications and more. 10 email types, 3 tones.
Write Email →
SEO Tools

Grow Your
Search Presence

Generate production-ready SEO meta tags for any page — including Open Graph and Twitter Card tags — in seconds.

Meta Tag Generator
Fill in your page details and get ready-to-paste HTML meta tags: Title, Description, Open Graph, Twitter Card and Robots — all in one place.
Generate Tags →
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