PDF Learning Center

Ten connected guides that explain how PDF tasks, formats, editors, privacy, devices and output decisions fit together.

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Choose a PDF topic

Start with the job in front of you. Each hub explains the limit of the tool that does that job: whether the page is copied, drawn on, or rebuilt as a picture. Short notes further down are instructions for one task, not a separate library of articles.

PDF Tools for Everyday Tasks

Choose the right PDF tool for merging, splitting, editing, signing, compressing, scanning and sharing everyday documents.

PDF Editors: Fundamentals and How They Work

Understand PDF layers, annotations, signatures, flattening, OCR and the limits of browser-based editing.

PDF Conversions and File Formats

A practical map of PDF, Word, JPG, PNG, HEIC and text conversion, with honest fidelity and privacy trade-offs.

Best PDF Editors: Comparisons and Alternatives

Compare browser, desktop and cloud PDF editors by task, privacy, output quality, cost and device support.

PDF Errors, Corrupt Files and Fixes

Diagnose PDFs that will not open, upload, print, copy, convert or display correctly, then choose the safest fix.

PDF Privacy, Security and File Safety

Learn how local processing, encryption, metadata, redaction and safe handling affect confidential PDF documents.

PDF Editors on Mobile, Desktop and Browsers

Choose a PDF workflow for Android, iPhone, Windows, macOS and modern browsers without losing control of the file.

Free vs Paid PDF Editors: What You Pay For

Decide when a free browser tool is enough and when desktop, cloud or enterprise PDF software is worth paying for.

Best PDF Editors for Specific Jobs

Match PDF tools to student, office, legal, creator, small-business, photo and document-scanning workflows.

PDF Quality, File Size and Output Control

Control resolution, compression, page size, image quality and text selectability before exporting or sharing a PDF.

Step-by-step how-to guides

One task per note, with the limit that matters and a link to the tool. They are instructions, not extra articles.

How to Convert PDF to JPG (Free, High Quality)

Convert a PDF to JPG images free: pick the pages, choose 150 or 300 DPI, and save one JPG or all pages in a ZIP — on Windows, Mac, Android or iPhone.

How to Convert JPG to PDF (Multiple Photos into One PDF)

Convert JPG to PDF free: combine several photos into one PDF, set the order and page size, and keep full image quality — on desktop or phone, no app needed.

How to Convert Word to PDF Without Losing Quality

How to convert Word (DOCX) to PDF online free without losing image quality or formatting — no email, no sign-up — plus fixes for fonts, images and page breaks.

How to Rotate a PDF and Save It Permanently

Fix an upside-down or sideways PDF: rotate one page or all pages 90° or 180° and save the rotation permanently, free in your browser — plus why viewer rotation is not saved.

How to Add Page Numbers to a PDF

Add page numbers to a PDF free: choose bottom left, centre or right, start from any number, skip the cover page, and keep numbers readable on scans.

How to Extract Pages from a PDF

Extract one page or a page range from a PDF into a new file, pick separate pages, or split every page — free, in your browser, with no quality loss.

How to Extract Text from a PDF That Contains Images

Extract text from a scanned PDF or a PDF image with free OCR, or copy selectable text directly — then convert the scanned PDF to Word. 14+ languages, no upload.

How to Add a Watermark to a PDF

Add a text watermark such as DRAFT or CONFIDENTIAL to every PDF page free, pick a readable opacity, and learn when and how a watermark can be removed.

How to Make Name Tracing Worksheets for Kids (Free)

Make free, editable name tracing worksheets for preschool and kindergarten: choose dotted letters, guide lines and practice rows, then print a PDF in minutes.

Proforma Invoice Template and Format (Word, Excel or PDF)

Free proforma invoice template guide: the fields a proforma invoice needs, a Word/Excel layout, and how to create a proforma invoice PDF online in minutes.

How to Remove a Background and Save a Transparent PNG

Remove the background from a photo, PNG or PDF image with free AI cutout, clean the edges and export a transparent PNG or a PDF with a white background.

How to Edit a PDF Online for Free

Edit a PDF online free: change existing text, add text and images, highlight, fill forms, sign and manage pages in your browser — no login, no upload.

How to Add Pages to a PDF

Add pages to a PDF free: insert pages from another PDF between any two pages, add a blank page, reorder and remove pages — all in your browser.

Editores de PDF gratuitos vs pagos (Português)

Principais diferenças entre editores de PDF gratuitos e pagos.

Timetable and school schedule guides

Plan a school timetable, bell or block schedule, study timetable or homeschool week — with conventions from schools around the world.

How to Make a School Timetable: Step-by-Step Guide

How to make a school timetable or class schedule: set periods and bell times, add breaks, balance subjects and teachers, and print a clear PDF.

How to Make a Study Timetable That Actually Works

Make a study or revision timetable for exams: find your real free hours, weight subjects, use focused blocks with breaks and print a free study schedule.

Bell Schedule vs Block Schedule: Types of School Schedules Explained

Traditional bell schedule, 4×4 block, A/B block, rotating and two-week timetables explained — with lesson lengths, pros and cons, and how to make each one free.

School Timetables Around the World: Days, Periods and Breaks by Country

How school timetables differ by country: school week, lesson length, breaks and time format in the US, UK, India, the Gulf, Germany, France, Brazil and more.

How to Make a Homeschool Schedule (with a Free Template)

Make a homeschool schedule that fits your family: a daily rhythm, subjects across the week, several ages, breaks and outings — plus a free printable template.

Free Timetable & Class Schedule Maker

Make a school, teacher, exam or study timetable with bell times, breaks, auto-generate and a live view — in 7 languages.

Calendars and holiday lists 2027

Calendar 2027 with Holidays

All 12 months of 2027 with holidays and free printable PDFs.

Indian Holidays 2027

Gazetted and restricted holidays, festivals and state days.

West Bengal Holidays 2027

Durga Puja, Kali Puja, Poila Boishakh and the Bengali calendar.

Islamic Calendar 2027

Ramadan 2027, Eid dates and Hijri months.

How the learning center supports the tools

Tool pages help complete a task. These guides explain why a workflow works, what can go wrong, which output to choose and where the limits are. Each guide links to related tools and neighboring topics; the tools link back into the learning center so users and crawlers can move through a clear subject structure.

Start with these paths

Invoice guides and templates

Create, customize and review an invoice using 19 gallery choices. These six guides cover document types, services, payment terms, saved projects and tax controls.

How to Create an Invoice Online for FreeLearn what to include in an invoice, add your business and item details, review the totals and download a PDF using LyfPDF's free invoice generator.Invoice vs Receipt, Quote & Proforma: Key DifferencesUnderstand when to use an invoice, receipt, quotation, estimate, proforma invoice or credit note, and select the matching document type in LyfPDF.Freelance & Consulting Invoice ExamplesSee how to describe freelance and consulting work, enter hourly or fixed project fees, add payment terms and choose an editable invoice template.Invoice Payment Terms, Due Dates & Amounts PaidLearn how to display payment terms, a due date, payment instructions and amounts already paid, then check the balance on your invoice before sending it.Customize & Reuse an Invoice TemplateAdd your logo, adjust the invoice style, save an editable project and reuse your setup. Learn how PDF, JSON projects and CSV item data differ.Set Invoice Currency, Tax Labels & RatesLearn where to set currency, tax labels, rates, discounts and amounts paid in LyfPDF, and what to review before downloading your invoice PDF.

Worksheet guides

Guides for the Worksheet Generator, one suite with eight worksheet modes for teachers and parents.

Worksheet Generator Guide: Create Tracing WorksheetsChoose one of eight worksheet types, pick a class level and preset, adjust the practice, apply a print-safe template and export a PDF.Shape Tracing Worksheet GuideUse 120 shapes and object outlines: search and filter, model-trace-draw, start dots, replace without losing layout and print in B&W.Open the Worksheet GeneratorName, alphabet, number, shape, word, sentence, handwriting and pattern tracing worksheets in one studio.