Docexp Blog
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Excel to CSV: What Actually Breaks, and Why Your Exports Keep Getting Rejected
Excel to CSV should be a one-click conversion. Here is why multi-tab workbooks, live formulas, and locale settings turn it into a debugging session, and how to convert a sheet in your browser without any of it.
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JSON to CSV: What Happens to Nested Objects, Arrays and Missing Keys
An API's JSON and a spreadsheet's CSV are different shapes, not just different syntax. Here's exactly what a converter does with nested objects, arrays, and records whose keys don't match — and how to flatten data first so nothing turns into "[object Object]".
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HEIC to JPG — Why iPhone Photos Won't Upload, and Three Free Fixes
An iPhone photo that says .jpg and still won't upload is usually still HEIC inside. Here is why Chrome and Firefox can't open it, and three free ways to fix it — including one that works without changing anything on your phone.
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Image to PDF for PAN Card Uploads — the Official Size Limits, and How to Hit Them
PAN portals want your proof documents as PDF under 300 KB per page, and they reject phone photos on sight. Here is the official spec, quoted from the processor that runs the portal, and how to turn camera photos into a compliant PDF without your Aadhaar touching anyone's server.
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PDF to Word Without Losing Formatting — Why Layout Breaks, and What Actually Works
Every PDF to Word converter mangles some documents, and it is not incompetence, it is geometry. Here is why layout breaks, which PDFs convert cleanly, which never will, and how to tell before you waste an afternoon fixing paragraph marks.
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Exact Age by Date of Birth: How It's Actually Counted, and Why Two Forms Disagree
Your exact age in years, months and days depends on rules most calculators never mention - the cutoff date, the borrow from unequal months, the birthday-boundary wording, and February 29. Here is how age is really computed, and how to get the number a specific form wants.
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Documents Required for ITR Filing — the Official List, and the One Thing Nobody Tells You
The Income Tax Department's own list of documents you need to file your return, quoted verbatim, plus the detail that changes how you prepare - you don't upload any of them. Here is the checklist, where each document comes from, and how to keep the set organised without your tax papers touching a random website.
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Passport Photo Rejected? The Official Rules, Quoted
Why passport photos get rejected, quoted from the UK, US and Indian authorities themselves — including the new rule against editing them with AI, which is checked.
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How to Merge Form 16 Part A and Part B into One PDF (Free, and Nothing Gets Uploaded)
Your employer sent Form 16 as two separate PDFs. Here is what Part A and Part B actually are, how to combine them in your browser in ten seconds, and why a tax document should never touch a random merge site.
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Are Online PDF Tools Safe? What Actually Happens to Your Files
Most online PDF tools upload your document to a server to process it. Here's what that means for your privacy, how to tell which tools do it, and how browser-based tools avoid it entirely.
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How to Save a PDF as JPG: Free Ways on Windows and Mac
Save a PDF as JPG free: Mac Preview's Export, a Windows screenshot, or every page at once in your browser with no upload. Plus when PNG is the better choice.
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How to Split PDF Files Free: 4 Ways, No Upload or Signup
Open the PDF in Chrome, press Ctrl+P, pick Save as PDF and type the page range. To split into equal parts or many files at once, do it free in your browser with nothing uploaded.
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How to Merge PDF Files Without Uploading Them Anywhere
Most "free PDF merger" sites send your documents to their servers first. Here's how to combine PDFs entirely on your own device — and how to verify for yourself that nothing was uploaded.
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Passport Photo Sizes in mm, Inches, Pixels and KB, by Country
Exact passport photo dimensions for the US, UK, India, Canada, Australia and Schengen, converted to inches and pixels at every common DPI, plus how to hit the KB limit free, at home.
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How to Compress a PDF to 100 KB (or Any Exact Size)
Most PDF compressors give you vague "low/medium/high" presets. Here's how to hit an exact file size limit like 100 KB or 300 KB — free, in your browser, without uploading anything.