WebFaz Blog
Articles written by Marcelo Amantino, who runs WebFaz, about privacy, processing files in the browser and practical ways to handle everyday tasks. For usage guides for each tool, see the “See the full guide” link on each tool’s page.
Tips
iPhone photo won’t open on Windows? How to convert HEIC to JPG without uploading your photos
Why the iPhone saves in HEIC, why the format fails in emails, websites and PCs, and how to batch convert to JPG right in the browser, with no upload and the quality and privacy points to watch.
October 21, 2026
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Tips
PDF turned into a mess in Word? Why it happens and how to convert with less rework
Broken tables, mixed columns, text out of place. Understand why converting a PDF to Word or Excel gets the layout wrong, how to tell if your file is scanned, and a routine to end up with minimal fixing.
October 21, 2026
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Tips
How to record your computer screen for free, with no watermark, nothing to install and your camera in the corner
Record a class, a tutorial or an error for support right in the browser: system sound and microphone, camera bubble, F9 and F10 shortcuts, and how to edit afterwards. And what does not work on phones.
October 21, 2026
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Tips
Subtitles early, late or in the wrong format? How to fix, convert and translate SRT, VTT and ASS
Out-of-sync subtitles, a format your player does not accept or a video with no text: learn to adjust timing, convert between SRT, VTT and ASS, extract the subtitles from inside a video and translate with review.
October 21, 2026
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Productivity
How to calculate hours worked, overtime and time bank without errors (8h30 is not 8.3 hours)
The classic spreadsheet mistake, the step-by-step to add up the month’s working hours, how to convert hours to decimals to bill a client, and how to check balance and overtime. With an example and limits.
October 21, 2026
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Tips
Is your text readable for everyone? How to check color contrast (WCAG) and convert HEX, RGB and HSL
Light gray on white, a button that vanishes in sunlight, a color that does not exist in CSS: learn how to test AA and AAA contrast, convert HEX, RGB, HSL and OKLCH, build palettes and simulate color blindness.
October 21, 2026
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Tips
How to extract images from a PDF, Word, PowerPoint or Excel file without losing quality
Lost the original photos and only have the document? Learn how to pull the images out of PDF, DOCX, PPTX, XLSX and ZIP, why the result changes with the format and what to expect from each one.
October 21, 2026
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Tips
How to send files from iPhone to Android, Windows or Mac with no cable and no sign-up
AirDrop only works between Apple devices. Learn how to send photos, videos and files between iPhone, Android, Windows and Mac on the same Wi-Fi network, straight from one device to the other, and when it doesn’t work.
October 21, 2026
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Privacy
Why processing files in the browser is more private (and what that does not guarantee)
What it means for a tool to run “in the browser”, how to confirm it yourself in two minutes and which data can still leave your device.
October 5, 2026
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Privacy
Is your photo giving away where you live? How to remove location (GPS) from photos, PDFs and Office files
Photos, PDFs and Word, Excel and PowerPoint documents hold hidden data: location, author, device. Learn how to check the risk, avoid it at the camera, clean what already exists and what cleaning does not solve.
October 5, 2026
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Tips
How to reduce the size of a PDF and a video to send by email
What makes a file heavy, how to shrink it without ruining the result and what to do when it still does not fit in the attachment.
October 5, 2026
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Tips
WhatsApp voice message or recorded meeting: how to turn it into text in minutes (and what not to send to AI)
Tired of listening to long audio or writing minutes by hand? Learn how to transcribe audio and video into text, improve accuracy, review the result and decide what can or cannot be sent to an AI service.
October 5, 2026
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Tips
PNG, JPEG or WebP: which image format to use in each situation
Practical differences between the most common image formats, when each one is the best choice and mistakes that make the file bigger or worse.
October 5, 2026
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Tips
How to create a Pix QR Code and test it before printing
Step by step to generate a Pix QR Code, check that it scans well on several devices and avoid the mistakes that make the customer give up paying.
October 5, 2026
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Tips
MP3, WAV or FLAC: which audio format to choose
Understand the difference between lossy and lossless audio formats, which to choose for listening, editing or archiving, and why converting MP3 to WAV improves nothing.
October 5, 2026
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Tips
What OCR is and how to improve accuracy when reading a photo of a document
How OCR turns an image into text, why it makes mistakes and a checklist to photograph and review documents with far more accuracy.
October 5, 2026
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Tips
Countdown for a launch or live stream: how to build one and take people to the link at the right moment
How to create a countdown that grabs attention, works at the right time and ends by taking you to the live or launch link, with a test routine.
October 5, 2026
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Productivity
The Pomodoro technique: how to use focus and break cycles without getting tangled up
What the Pomodoro technique is, how to set up your cycles, how to handle interruptions and how to adapt the times to your type of task.
October 5, 2026
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