Online Convertio Blog
Practical, step-by-step guides to help you work with data, images and documents faster and more privately.
How to Compress a Photo to 20 KB, 50 KB or 100 KB for Online Forms
Shrink a photo to an exact size like 20 KB, 50 KB or 100 KB for job, exam and government forms, free and without uploading it.
Oct 24, 2026ExamsSSC Photo and Signature Size: How to Resize for CGL, CHSL, MTS and GD
The usual SSC photo and signature size, and how to resize and compress yours to the right pixels and KB in one step.
Oct 24, 2026ExamsIBPS and SBI Photo and Signature Size: Resize to 200x230 and 140x60
Bank exam forms for IBPS and SBI usually want a 200x230 pixel photo and a 140x60 pixel signature. Here is how to make both in seconds.
Oct 24, 2026ExamsUPSC Photo Size for the Online Application: Resize and Compress
UPSC asks for a square photo of 350 to 1000 pixels and 20 to 300 KB. Here is how to make one that passes, with tips on the photo itself.
Oct 24, 2026DocumentsHow to Reduce PDF Size to Under 100 KB, 200 KB or 1 MB for Online Upload
Upload portals often limit PDFs to 100 KB, 200 KB or 1 MB. Here is how to get a scanned PDF under the limit and still keep it readable.
Oct 24, 2026MediaHow to Make a Passport Size Photo (3.5 x 4.5 cm) Online for Free
Make a passport size photo of 3.5 x 4.5 cm (413 x 531 pixels) from any phone photo, ready for forms and printing.
Oct 24, 2026DocumentsWhy Is My PDF So Big? 7 Reasons and How to Fix Each One
A one-page PDF of 8 MB is common. Here are the seven usual reasons a PDF is huge, and the fix for each one.
Oct 24, 2026MediaWhy Does My Photo Look Blurry After Compressing? How to Fix It
Compressed photos can look blurry or blocky. Learn the real causes and how to get a small file that still looks sharp.
Oct 24, 2026DataHow to Convert CSV to JSON: 3 Easy Methods
Need JSON from a spreadsheet export? Here are three practical ways, and what to watch out for.
Oct 5, 2026BusinessQR Codes for Inventory: A Practical Labeling Guide
A scannable label is only useful if it is planned well. This guide covers IDs, sizing, printing and testing.
Oct 9, 2026Web PerformanceHow to Reduce Image Size for a Faster Website
Images are often most of a page weight. Follow this workflow to shrink them without visible quality loss.
Oct 13, 2026DocumentsHow to Merge and Compress PDFs Safely
Combining and shrinking PDFs is routine, but uploading private files to random sites is risky. Here is a safer way.
Oct 17, 2026MediaHow to Convert MOV, MKV or AVI Video to MP4
Why some videos will not play on your phone or TV, and how to turn them into MP4 in a few clicks without uploading them anywhere.
Oct 18, 2026DeveloperString to Number in JavaScript: parseInt, parseFloat and Number
A plain-language guide to turning text into numbers in JavaScript, and why parseInt and Number give different answers.
Oct 18, 2026DeveloperBoolean Conversion: Why "false" Can Be True in Code
A beginner-friendly look at truthy and falsy values, and how to turn text like yes, no, 1 and off into real booleans.
Oct 19, 2026DeveloperObject to JSON String and Back: Serialize and Deserialize Explained
What serialize and deserialize mean, how JSON.stringify and JSON.parse work, and the mistakes that cause bugs.
Oct 19, 2026DeveloperWhat Is Base64 and How Do You Encode or Decode It?
Base64 explained in simple words: what it is for, why it makes text longer, and why it is not encryption.
Oct 20, 2026DeveloperURL Encoding Explained: Why You See %20 in Web Addresses
Why spaces turn into %20, what encodeURIComponent does, and how to fix broken links and query strings.
Oct 20, 2026DevelopercamelCase, snake_case and kebab-case: Which Naming Style to Use
A friendly guide to naming styles in code, where each one is used, and how to convert between them quickly.
Oct 21, 2026DeveloperBinary, Hex and Decimal: How to Convert Between Number Bases
A simple guide to number bases, why computers use binary and hex, and how to convert between them by hand or with a tool.
Oct 21, 2026DeveloperUnix Timestamps Explained: Convert Seconds to a Readable Date
What a Unix timestamp is, why it looks like 1700000000, and how to turn it into a date you can read.
Oct 21, 2026DocumentsHow to Convert a PDF to an Editable Word Document
What to expect when turning a PDF into Word, why layout can change, and how to get the best result for free.
Oct 22, 2026MediaPNG, JPG or WebP? How to Convert Images and Keep Them Small
Which image format to pick for photos, logos and websites, and how to convert between them without losing quality.
Oct 22, 2026DataCSV to SQL and Markdown: Move Spreadsheet Data Without Retyping
Turn spreadsheet rows into SQL INSERT statements or a Markdown table in seconds, with tips to avoid common mistakes.
Oct 22, 2026DocumentsJPG to PDF and PDF to JPG: Quick Ways to Convert Photos and Pages
Combine photos into one PDF, or turn PDF pages into pictures. Simple steps and tips for a good result.
Oct 22, 2026DocumentsWord, Excel and CSV to PDF: Share Files That Look the Same Everywhere
How to turn a Word file, an Excel sheet or a CSV table into a PDF, what is kept and what is not.
Oct 22, 2026