The complete guide
Free Online Tools for PDF, GST, EMI, Salary and More — All in One Place
CodeMyindia is a free online toolbox with more than a thousand calculators, converters, PDF tools and everyday utilities. You can edit a PDF, merge files, calculate GST, check a home loan EMI, work out your in-hand salary or format JSON — without installing software, creating an account or paying a subscription. This guide explains what the site offers, how each group of tools works and how to get accurate results.
What is CodeMyindia?
Most people need a quick tool a few times every week. A student has to combine scanned assignments into one PDF. A shop owner wants to add GST to a price before sending a quotation. A salaried employee wants to know how much of a new CTC offer will actually reach the bank account. A developer needs to decode a Base64 string or pretty-print an API response. Usually that means searching Google, opening several websites, closing pop-ups and hoping the result is right.
CodeMyindia puts these jobs in one place. Every tool opens instantly in your browser, has a clean interface that works on phones and desktops, and gives you the answer without asking you to sign up. Each tool page also explains how the calculation or conversion works, so you understand the result instead of just copying a number. You can browse everything from the all tools page or use the search bar at the top of this page to jump straight to what you need.
The toolbox is organised into clear groups: PDF tools, calculators, converters, developer tools, text tools, image tools and YouTube tools, plus topic hubs for GST, loans, salary and investments.
Free PDF tools online — edit, merge, compress and convert
PDF is the standard format for invoices, forms, certificates, bank statements and government documents, but the format is hard to change without paid desktop software. CodeMyindia's PDF tools cover the tasks people search for most often.
Edit PDF online
The online PDF editor lets you add text, draw, highlight, place shapes, cover content with a white box and sign a document, then download the edited file. It is useful for filling a form that was not made fillable, adding a signature to an agreement or marking up a draft for review. The editor adds new content on top of the page; it does not rewrite text that is already inside the PDF.
Merge, split and organise pages
With merge PDF online you can drop several files, drag them into the right order and download one combined document — handy for job applications, visa paperwork and loan files that ask for a single upload. Split tools do the reverse and pull out only the pages you need, while organise tools let you rotate, reorder or delete pages.
Compress PDF and convert formats
Many portals limit uploads to 1 MB or 2 MB. The compress PDF tool reduces file size so a scanned document fits those limits. Conversion tools turn PDF pages into JPG images, combine photos into a PDF, and extract content into Word, Excel or PowerPoint-friendly files. Results depend on the source: a clean digital PDF converts far better than a blurry phone scan.
GST calculator, EMI calculator, salary and tax tools
Money calculations are where small mistakes cost the most, so these tools show their working and let you change every input.
GST calculator online
The GST calculator adds GST to a base price (exclusive) or removes it from a final price (inclusive), and splits the tax into CGST and SGST for sales within a state or IGST for sales between states. Pick the rate that applies to your product or service and the tool shows the tax amount and the total. The GST tools hub collects related calculators for invoices, reverse calculations and business planning. Always confirm the current rate for your item with an official notification or your tax adviser, because GST rates are revised from time to time.
EMI and loan calculators
A home loan, car loan or personal loan EMI depends on three numbers: the loan amount, the interest rate and the tenure. Change any one and the monthly payment and the total interest change with it. The EMI and loan calculators use the standard reducing-balance formula used by banks, so you can compare offers, see how a longer tenure raises total interest and plan prepayments before you sign.
Salary and income tax calculators
A CTC figure is not what you take home. Provident fund, professional tax, income tax and other deductions all come out first. The salary and tax calculators help you estimate in-hand salary, compare tax regimes and understand where each rupee goes. Treat the result as an estimate — your actual payslip depends on your employer's salary structure and your declared investments.
Investment calculators
SIP, lumpsum, FD, RD, PPF and compound interest calculators in the investment calculators hub project how money grows over time at an assumed rate. They are planning aids, not guarantees: market-linked returns vary, and fixed-income rates are set by the bank or scheme at the time you invest.
Online tools built for India
Many tool websites are designed for the US or Europe and ignore how things work here. CodeMyindia includes a large collection of India-specific tools: professional tax by state, stamp duty and registration estimates, city-level cost calculators, bank-specific loan and deposit calculators, and utilities shaped around Indian formats such as lakh and crore number grouping and rupee amounts.
These pages are grouped by state, city, bank and task, so a search like "Maharashtra professional tax calculator" or "SBI FD calculator" lands on a page that speaks to that exact need. Rules and rates differ between states and institutions and can change, so each page encourages you to verify the final figure with the relevant authority or bank before making a decision.
India-specific pages are also written for the way people actually search. Someone in Pune may type "property tax calculator Pune", while a first-time borrower may search "HDFC home loan EMI for 30 lakh". Instead of one generic page that ignores these details, CodeMyindia offers focused pages that explain the local rule, show a worked example in rupees and point to related tools, such as a stamp duty estimate next to a home loan EMI calculator, so that you can plan an entire purchase from one site.
Developer tools, text tools and SEO tools
Developers and content writers need small utilities all day long. The developer tools include a JSON formatter and validator, Base64 encoder and decoder, URL encoder, hash generators, regex helpers, UUID generator and more — all running in the browser, so pasted code and API keys are not sent anywhere.
The text tools cover word and character counting, case conversion, removing extra spaces and line breaks, sorting lists and comparing text. They are useful when you must fit a strict limit, such as a meta description, a tweet or an application essay. SEO helpers support writing titles and descriptions, building slugs and checking basic on-page details, while YouTube tools help creators with titles, tags and thumbnails.
Unit converters and everyday utilities
The converters section handles length, weight, temperature, area, speed, data size, time and currency-style calculations, including Indian land units that vary by region. Generators create passwords, QR codes and random values, and image tools resize, compress and convert pictures for forms that demand exact dimensions or file sizes. Because they open instantly, it is often faster to use one of these tools than to look for an app on your phone.
Everyday utilities may look simple, but they save real time. Converting square feet to gaj or bigha before a property visit, resizing a passport photo to the exact size an exam form demands, or generating a strong password for a new bank login are all jobs that take seconds here. Each converter shows the conversion factor it uses, so you can check the figure yourself and apply the same logic offline whenever you need to.
Privacy: why your files stay on your device
Uploading a bank statement, Aadhaar copy or signed contract to an unknown server is a real risk. Most CodeMyindia PDF, image, text and developer tools process your data directly in your browser using modern web technology. Your file is read on your own device, the result is created there, and you download it — the document is not uploaded to our servers for processing.
That design has practical benefits too. There is no queue, no waiting for an upload on a slow mobile connection and no watermark added to your output. The main limit is your device's memory: very large files (CodeMyindia accepts PDFs up to 100 MB) may take longer on older phones. Read the privacy policy for full details.
How to use CodeMyindia in three steps
- Find the tool. Type what you need into the search bar — for example "merge pdf", "gst" or "emi" — or open a category from the menu.
- Enter your data. Add a file or type your numbers. Fields start empty so you never calculate with a hidden default by mistake.
- Get the result. Read the answer on screen, copy it or download the file. Scroll down any tool page for an explanation, worked examples and answers to common questions.
Why people choose CodeMyindia
- Free to use. No trial period, no premium wall in the middle of a task and no account required.
- Fast and mobile-first. Pages load quickly and work well on the phones most visitors use, not just on large desktop screens.
- One place for everything. PDF, finance, India-specific, developer and text tools share one design, so once you know one tool you know them all.
- Explained results. Every tool page describes the formula or process behind the output, so you can check it and trust it.
- Private by design. Most file and text tools work on your device instead of uploading your data.
Tips to get accurate results
For calculators, double-check the unit of every input: an annual interest rate entered as a monthly rate, or a tenure in months typed as years, is the most common reason for a wrong EMI. For GST, decide first whether your price already includes tax. For salary estimates, use your actual salary breakup if you have it rather than only the CTC total.
For PDF tasks, start from the best source file you have. If a portal rejects your document, compress it first, then check that text is still readable before submitting. When merging, rename files in order (01, 02, 03) so they appear correctly. Keep your original files until you have checked the downloaded result.
Finally, remember that online calculators give estimates. For tax filings, legal documents or large financial decisions, confirm the figures with a qualified professional or the official source. You can read more in our disclaimer.
Common questions about free online tools
Are CodeMyindia tools really free?
Yes. Every calculator, converter and PDF tool on the site can be used without payment and without creating an account. There is no daily limit on how many times you open a tool and no watermark on downloaded files.
Do I need to install any software or app?
No. The tools run in a modern web browser such as Chrome, Edge, Firefox or Safari on Android, iPhone, Windows, Mac or Linux. Open the page, use the tool and close the tab when you are done.
Is it safe to edit or merge a PDF online here?
The PDF tools read and build your files inside your browser, so the document is not uploaded to our servers for processing. That makes them a sensible choice for personal documents such as ID proofs, salary slips and bank statements. As with any device, avoid using a shared or public computer for sensitive files.
How accurate are the GST and EMI calculators?
They use the standard formulas: GST is calculated as a percentage of the taxable value, and EMI uses the reducing-balance method that banks use. The output is as accurate as the numbers you enter. Banks may round figures differently or add processing fees and insurance, so your loan sanction letter can show a slightly different amount.
Can I use these tools on my mobile phone?
Yes. The site is designed for small screens first. Buttons are large enough to tap, tables scroll sideways when needed, and file tools let you pick documents straight from your phone's storage or downloads folder.
Why can't the PDF editor change existing text?
Text inside a PDF is stored as positioned drawing instructions rather than editable paragraphs, so changing it reliably needs the original fonts and layout data. The editor instead lets you cover old content with a white box and type new text on top, which works well for correcting forms, dates and names.
What is the maximum file size?
PDF tools accept files up to 100 MB. Because processing happens on your device, large files run faster on a laptop or a recent phone with more memory. If a file is very big, try splitting or compressing it first.
Does CodeMyindia save my calculation history?
No account means there is nothing stored against your name. If you want to keep a result, copy it, take a screenshot or download the output file. Refreshing the page starts with a clean, empty form.
How often are new tools added?
The collection keeps growing based on what visitors search for and request. If a tool you need is missing, send a note through the contact page and describe the task — clear requests are the quickest to build.
Start with the right tool
If you are not sure where to begin, these are the tools visitors open most: the PDF editor, merge PDF, compress PDF, the GST calculator, the EMI calculators and the salary calculators. For guides and explainers, visit the CodeMyindia blog. Have a suggestion for a new tool? Contact us — many of the tools on this site were added because a visitor asked for them.
Bookmark CodeMyindia and the next time you need a quick calculation, a PDF fix or a format conversion, you will have a free, fast and private tool ready in seconds.