47 free tools · 21 new
Resize photos for forms, fix PDFs, make UPI QR codes and work out GST, SIP or EMI. Every tool runs in your browser, so your files never leave your device.
Most used
Images
Exact pixels and KB limits for online application forms.
Edit PDF
Shrink PDF files for email and upload limits. Choose the compression level.
Everyday
QR codes for links, Wi-Fi and UPI payments. PNG or SVG.
Loans & Tax
Add or remove GST with CGST/SGST or IGST and multiple items.
Text
Words, characters, reading time, SEO/social limits and case conversion.
Calculators
Exact age in years, months and days, or 'as on' an exam cutoff date.
Guides
There are well over a thousand mutual fund schemes in India, but for most goals you only need to choose between a handful of categories, and within them, a few simple checks narrow it to two or three funds.
Ram··7 min read
For most salaried people, the new regime now wins by a wide margin. The question is whether you're one of the exceptions. Here's the tax at each salary level, and how much in deductions you'd need for the old regime to come out ahead.
Ram··7 min readFor monthly salary, there's no contest: invest it as it arrives. The real question comes up when a bonus, FD maturity or inheritance lands all at once. Here's what the numbers say, and a calm way to invest it.
Ram··5 min readI heard the word SIP for years before I understood it. This is the explanation I wanted: what actually happens each month, how to pick an amount, how it's taxed, and which mistakes cost the most.
Ram··7 min read
Installing Docker takes ten minutes. Most of the pain comes afterwards: permission errors, a daemon that isn't running, a database container your app can't reach yet. Here's the install plus the fixes.
Ram··8 min read
The Ubuntu installer itself is easy. What trips people up is everything around it: BitLocker, Fast Startup, Secure Boot and the boot menu key. Here's the whole process, including those.
Ram··8 min read
Most system design guides draw boxes for an imaginary Twitter. This one uses a real, small system, the site you're reading, to show caching, atomic counters, a genuine race condition, and what would have to change at scale.
Ram··8 min readFresh
An emergency fund isn't an investment. It's what stops a job loss or a hospital bill from forcing you to sell investments at the worst time. Here's how to work out your number, where to keep it, and how to build it.
Ram
A form wants a JPG of something you have as a PDF, or the other way round. Here's how to decide which format a document should be in, and how to convert without ending up with a blurry mess.
Ram
Loan applications and visa forms always want one PDF made of ten. Here's how to merge them without sending your bank statements to someone else's server, and how to verify that nothing was uploaded.
Ram
The regex syntax I look up most often, on one page, plus a set of practical patterns (including Indian PAN, PIN and mobile numbers) and the mistakes that cause wrong matches or hung servers.
Ram
Base64 shows up in auth headers, JWTs, data URIs and API payloads. It's simple once you see the 3-bytes-to-4-characters trick, and most of the bugs come from three predictable places.
Ram
Most of us copy the Authorization: Bearer pattern from a tutorial and move on. This is the version I wish I'd read first: what's in the token, what the signature really protects, and the mistakes I keep seeing.
Ram
JSON has six value types and a handful of strict rules. Learn those, and the error messages start making sense. Here's the whole thing, plus how to parse it in JS and Python and when to reach for YAML or TOML instead.
RamA 10% step-up roughly doubles a 20-year SIP's final value. Most articles call that the power of compounding. It's mostly the power of investing more money, which is still the right move. Here are the real numbers.
Ram
Before comparing ELSS, PPF and NPS, answer one question: are you even on the old tax regime? If you are, here's how the three compare on returns, lock-in and tax, with current numbers.
Ram₹5,000 a month is where a lot of people start. Here's what it can grow to under realistic assumptions, how to split it (hint: one or two funds is plenty), and the habit that matters more than fund choice.
Ram
A ₹50 lakh home loan over 20 years at 8% costs about ₹50 lakh in interest, so you repay roughly double. Here's how to size the loan, cut that interest with early prepayments, and plan for the costs no one mentions.
Ram
Ratios won't tell you what to buy, but they're very good at telling you what to look at next. Here are 12 worth knowing, worked through on a sample company, plus the red flags that matter more than any of them.
Ram
An SWP pays you a fixed amount every month from a mutual fund, while the rest stays invested. Whether it lasts 15 years or 40 depends less on returns than on two things most guides skip: inflation and bad timing.
Ram
Both will run your API fine. The real differences are in how they handle concurrency, how much structure they give you, and what your team already knows. Here's how I'd decide.
Ram
Half the extensions on most 'must-have' lists are now built into VS Code. Here's what's still worth installing, what you can delete, and the settings that matter more than any extension.
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