PDFtoWorld Blog

Guides and tips to work faster with PDF and digital documents.

• How To

  How to merge several audio files or MP3s into one

  Join MP3s, combine voice messages, assemble the parts of a podcast or a lecture: merge audio files online in the order you want, trimming each file, with silences and fades between them.

  Oct 28, 2026 · 4 min read

• How To

  How to trim an audio file or an MP3 online, for free

  Shorten an MP3, cut out a passage, remove silence or make a ringtone: trim an audio file online, without software and without uploading it, with fades and a choice of MP3 quality.

  Oct 28, 2026 · 4 min read

• Productivity

  How to compress an image (JPG, PNG, WebP) with no visible loss

  Shrink a photo for a website, an email or an upload form: which quality setting to choose, which output format, and how to compare before downloading.

  Oct 28, 2026 · 3 min read

• How To

  iPhone HEIC photos: how to convert them to JPG (and avoid the problem)

  Why your iPhone saves HEIC photos, how to convert them to JPG on a computer or phone, and how to set up your iPhone so it never happens again.

  Oct 28, 2026 · 4 min read

• How To

  How to convert JPG photos to PDF (one or several images)

  Turn a photo, a receipt or several images into a single PDF, choose the order and the page size (A4, Letter), for free and without uploading your photos.

  Oct 28, 2026 · 3 min read

• Document Management

  Delete, move, extract: how to organise the pages of a PDF

  Remove a blank page, put pages back in the right order or extract a few pages from a PDF: which tool to use and how, step by step.

  Oct 28, 2026 · 3 min read

• How To

  How to merge PDF files into one (free, no software needed)

  Combine several PDFs into a single document, choose the order of the files, mix scans and invoices: the free, private online method, step by step.

  Oct 28, 2026 · 4 min read

• How To

  How to extract audio from a video: convert MP4 to MP3

  Get the audio track of an MP4 video (lecture, meeting, interview, video podcast) as an MP3, online and without software, with the right habits on quality and rights.

  Oct 28, 2026 · 4 min read

• PDF Guides

  OCR: how to make a scanned PDF searchable and copyable

  What OCR is, how to turn a scan or a photo of a document into a PDF you can search and copy text from, and how to get the best recognition.

  Oct 28, 2026 · 3 min read

• How To

  How to add page numbers to a PDF (position, format, starting number)

  Add page numbers to a PDF: choose the position, the "1 / 10" or "Page 1" format, start at a number other than 1, and avoid the usual pitfalls.

  Oct 28, 2026 · 3 min read

• How To

  How to convert a PDF to JPG (every page as an image)

  Turn the pages of a PDF into JPG images to post them, add them to a presentation or send them in a chat, for free and right in your browser.

  Oct 28, 2026 · 3 min read

• PDF Guides

  Convert a PDF to an editable Word document: what carries over and what doesn't

  Turn a PDF into a Word document (DOCX) to rewrite its text: the online method, what the conversion really keeps, and what to do with a scanned PDF.

  Oct 28, 2026 · 4 min read