Blog
By Siavash Ghanbari · Founder of Emojar
👻Invisible Character Not Working? Fixes for Names and Hidden Bugs
Why apps reject blank names, why a pasted password suddenly fails, and how to find and remove zero-width spaces and other hidden characters.
Tool GuideTextUnicodeTroubleshooting🔓PDF Password Won't Come Off? Unlock Problems and Fixes
Wrong-password errors, restricted PDFs that open fine but won't print, files that say they aren't encrypted. How to remove a PDF password you already know.
Tool GuidePDFPasswordsTroubleshooting🔗URL Decoding Problems: %25, Plus Signs and Malformed Input
Why decoded URLs show %20 twice over, why C++ turns into C, and what 'malformed URI' really means. A troubleshooting guide to percent-decoding.
Tool GuideDeveloperURLsTroubleshooting🧾Why a PDF Form Won't Fill In, and How to Fix It
No fields found, an XFA warning, answers missing in someone else's viewer, or a box that cuts you off? What each PDF form problem means and what to do next.
Tool GuidePDFFormsTroubleshooting📃Why PDF Text Extraction Comes Out Empty or Jumbled (and Fixes)
Extracted text from a PDF and got nothing, mixed-up columns or gibberish? Here's what causes each problem and how to clean up the result quickly.
Tool GuidePDFTextTroubleshooting📷Why Won't My QR Code Scan? Common Causes and Fixes
Blurry photos, low contrast, glare, a blocked camera or a code that isn't a QR code at all. How to fix a QR code that won't read, and scan it safely.
Tool GuideGeneratorsQR CodesTroubleshooting♿Why Your Colors Fail WCAG Contrast (and How to Fix Them)
Gray text that looks fine, a brand blue that fails, white on yellow: the most common WCAG contrast failures, what causes them, and how to fix each one.
Tool GuideColorAccessibilityTroubleshootingxⁿWhy Your Exponent Answer Looks Wrong, and How to Fix It
Got 1.9999986 instead of 2, an error for a negative base, or "Too large to display"? Here is what each exponent result means and how to get the answer you want.
Tool GuideCalculatorsMathTroubleshooting⏲️Online Timer Alarm Didn't Go Off? Causes and Fixes
Silent alarms, missing notifications and late alerts in background tabs usually have simple causes. Here's how to check each one before you rely on a timer.
Tool GuideDate & TimeTimeTroubleshooting✅9 Common JSON Syntax Errors and How to Fix Each One
Trailing commas, single quotes, comments, NaN, leading zeros. See the error message each mistake produces and the one-line fix for it.
Tool GuideDeveloperJSONTroubleshooting📷Webcam Not Working? A Checklist Before Your Next Call
Black screen, blocked access, wrong camera or a choppy picture? Work through the usual causes in order and check your real resolution and frame rate.
Tool GuideDevice TestsDevicesTroubleshooting