Guides
How to get your documents ready for applications, filings and portals, with requirements taken from official sources.
Can't Copy Text From a PDF? Why It Happens and How to Fix It
If a PDF won't let you select or copy text, or pastes as gibberish, it's almost always a scan or a restriction. How to tell which one and fix it.
6 min read
How to Reduce PDF File Size Without Losing Quality
What you can strip from a PDF with no visible change, what costs sharpness, and the order to try things: compress, maximum compression or an exact size like 1 MB.
7 min read
How to Scan Multiple Pages Into One PDF on Your Phone
Step by step: turn several documents photographed with your phone into one ordered, readable PDF that fits the upload limit of an application portal.
6 min read
Electronic vs. Digital Signature: What's the Difference?
What an electronic signature is, what a certificate-based digital signature is, when each is used, and which kind the ConvertirDocs Sign PDF tool creates.
6 min read
How to Convert iPhone HEIC Photos to JPG
Your iPhone photos are HEIC files and a website or Windows PC won't open them. What the format is, and three ways to get JPGs, including Apple's own setting.
5 min read
How to Open and Convert WEBP Images to JPG or PNG
You saved an image from a website and got a .webp file your app or upload form won't accept. What WEBP is and how to turn it into JPG or PNG, keeping transparency.
4 min read
How to Reduce a Photo's File Size for an Online Form (to X KB)
The form wants a JPG under a certain number of KB, at set pixel dimensions. How to crop, resize and compress your photo without it looking bad.
5 min read
How to Turn Photos Into a PDF on Your Phone
Convert one or several photos into a PDF on Android or iPhone. The built-in options, how to combine several photos in order, and how to shrink the file.
6 min read
Why Is My PDF So Large? And How to Shrink It
The real reasons a PDF gets heavy (scans, phone photos, fonts, color) and how to pick a compression level or the exact target size a portal asks for.
6 min read
A Smallpdf Alternative With No Download Limits or Uploads
Smallpdf and ConvertirDocs compared on file uploads, retention, free-plan limits, sign-up and price, from Smallpdf's official pages, checked in September 2026.
6 min read
An iLovePDF Alternative That Doesn't Upload Your Files
How iLovePDF and ConvertirDocs differ on file uploads, free-plan limits, sign-up and price, based on iLovePDF's official pages, checked in September 2026.
6 min read
C.D. Cal. CM/ECF: 35 MB PDF Limit and Filing Rules
The Central District of California caps e-filed PDFs at 35 MB and bans scanned documents except some exhibits. How to prepare, split and OCR your filings.
5 min read
eFileTexas PDF Requirements: Searchable, 300 DPI, No Passwords
Texas e-filing requires text-searchable PDFs on 8.5x11 pages, 300 DPI scans, no passwords and short file names. How to avoid returned filings.
4 min read
Grants.gov Attachments: File Names, Formats and Size
Grants.gov wants attachment names of 50 characters or fewer, unique and with only allowed characters. How to prepare PDFs so your package is accepted.
4 min read
How to Make a PDF Small Enough to Email
Gmail caps attachments at 25 MB and Outlook desktop at 20 MB by default. How to shrink, split or rethink a PDF so your email goes through.
5 min read
How to Merge Documents Into One PDF for an Application
Many portals take one file per field. How to combine PDFs, photos and Word files into a single, well-ordered PDF that stays under the upload limit.
5 min read
How to Password-Protect a PDF (and When Not To)
Add an open password with AES-256 encryption, choose print and copy permissions, share the password safely, and know which portals reject it.
4 min read
How to Scan Documents With Your Phone Into a Clean PDF
Turn paper into a sharp, straight, multi-page PDF with just your phone's camera and a browser. Lighting, cropping, filters and common mistakes.
4 min read
How to Sign a PDF on Your Phone Without an App
Draw, type or upload your signature and place it on any PDF page from your phone's browser. What this signature is and when it's accepted.
4 min read
How to Turn Phone Photos Into One PDF (iPhone and Android)
Combine photos from your phone into a single PDF in the right order, with the right page size and margins. Includes the iPhone HEIC question and size tips.
4 min read
ImmiAccount Attachments: Size, Formats and Upload Tips
ImmiAccount takes documents up to 5 MB each and no encrypted PDFs. How to scan, group and shrink files for your Australian visa application.
4 min read
IRCC Document Uploads: File Size Limits and Formats
IRCC upload limits depend on the account: 4 MB or 5 MB per file, with one file per field. How to combine, shrink and name documents for Canada.
5 min read
IRS Document Upload Tool: File Types, Sizes and Tips
The IRS Document Upload Tool takes JPG, PNG or PDF files up to 15 MB each, 40 per submission. How to scan, combine and name your IRS responses.
4 min read
NYSCEF PDF Requirements: PDF/A, Searchable, 200 DPI
New York's NYSCEF wants PDF/A, text-searchable files with 1-inch margins, 200 DPI scans, no passwords and short names. How to prepare a compliant filing.
5 min read
US Tax Court DAWSON: Preparing Your Petition PDFs
DAWSON accepts only PDFs up to 250 MB, not encrypted. How to redact SSNs, keep the STIN separate, split large files and sign your Tax Court petition.
4 min read
USCIS Online Filing: How to Prepare Evidence Uploads
USCIS online filing takes PDF, JPG or JPEG evidence files up to 12 MB, with no passwords. How to scan, name, combine and shrink your documents.
5 min read