Guides & how-tos
Plain-English walkthroughs for every tool on ZapMorph, with real screenshots. Each one covers the quick way, the do-it-yourself way, and the gotchas we’ve run into along the way.
- VideoSubtitles
Audio & video2 min read
How to Generate Subtitles (SRT and VTT) for Any Video Automatically
Create timed captions for lectures, interviews, reels and meetings with speech recognition that runs on your own device. Get both SRT and VTT files.
- ImagesPNG
Image2 min read
How to Remove the Background From a Photo (Transparent PNG)
Cut out products, people and pets from their background automatically and download a transparent PNG. The AI runs on your device, so photos aren't uploaded.
- PDF
PDF2 min read
How to Sign a PDF Online Without Printing or Scanning
Draw, type or upload your signature, add initials and the date, and place them anywhere on a PDF. The document stays on your device the whole time.
- Images
Image3 min read
How to Compress Images Without Making Them Look Bad
Shrink JPG, PNG and WebP images for email, upload forms and websites. Which quality setting to use, when to resize, and when to switch format.
- PSTPDF
Email2 min read
How to Convert an Outlook PST File to PDF Without Outlook
Open an old Outlook .pst archive and save its emails as a PDF, with sender, recipients, date and subject on every message. No Outlook needed, nothing uploaded.
- JSON Formatter
Dev tools2 min read
How to Format, Validate and Minify JSON (and Find the Error)
Paste messy or minified JSON and make it readable, minify it for config, or find exactly which line and column breaks it. Runs privately in your browser.
- VideoMP4
Audio & video2 min read
How to Convert Any Video Format (MP4, MOV, MKV, AVI, WebM, WMV)
One converter for every video: turn MOV, MKV, AVI, WebM, WMV, FLV or 3GP into MP4, WebM, MOV, MKV, an animated GIF, or just the MP3 soundtrack. Private.
- JPGPDF
PDF3 min read
How to Convert JPG to PDF (Combine Photos Into One PDF)
Turn photos of receipts, documents or artwork into a single PDF. Choose A4, Letter or original size, set margins and put the pages in the right order.
- PST Viewer
Viewers2 min read
How to Open a PST File Without Outlook (Mac, PC or Phone)
Browse every folder of an Outlook PST, search by sender or subject, read emails and download attachments in your browser. No Outlook, no upload.
- HEICJPG
Image4 min read
How to Convert HEIC to JPG (iPhone Photos on Windows, Mac or Android)
iPhone photos showing up as HEIC files nobody can open? Here's how to turn them into normal JPGs, a whole batch at a time, without uploading them anywhere.
- MP4MP3
Audio & video2 min read
How to Extract Audio From a Video (MP4 to MP3)
Pull the soundtrack out of an MP4 video as an MP3: a lecture to listen to on a walk, a voice note from a video message, or music from your own clips. Private.
- QR Code Generator
Dev tools2 min read
How to Make a QR Code That Never Expires (Links, Wi-Fi and More)
Create free static QR codes for a website, Wi-Fi network, email, phone number or text. Pick colors and download a PNG or a print-ready SVG.
- OSTPDF
Email2 min read
How to Convert an Orphaned Outlook OST File to PDF
Recover emails from an Outlook .ost file when the Exchange or Microsoft 365 account is gone, and save them as one readable PDF. Private, nothing uploaded.
- PDF
PDF2 min read
How to Merge PDF Files Into One (In the Right Order)
Combine several PDFs into a single document, arrange them in any order, and download. No upload, no watermark, works on any computer.
- PDF Viewer
Viewers2 min read
How to Open and Read a PDF Without Adobe Acrobat
View PDFs with sharp zoom and page navigation in any browser, on shared or locked-down computers where you can't install a reader. Private, free.
- PNGJPG
Image3 min read
How to Convert PNG to JPG Without Losing Quality
PNG screenshots too big to email or upload? Here's how to turn them into JPGs in seconds, what happens to transparency, and which quality setting to pick.
- EmailPDF
Email2 min read
How to Merge Many Emails Into One PDF (in Date Order)
Combine EML and Outlook MSG emails into a single PDF, sorted by date, each starting on a new page. Ideal for evidence bundles and client correspondence.
- Gmail Takeout Viewer
Viewers2 min read
How to Open and Read Your Gmail Takeout Export
Open your Google Takeout Gmail export, the .mbox or the whole .zip, then browse, search and download emails and attachments in your browser.
- PDF
PDF3 min read
How to Compress a PDF to Fit Email and Upload Limits
Make a PDF smaller for email or an upload form. Which compression level to choose, why scans shrink the most, and what to do if the file won't get smaller.
- PSTvCard
Email2 min read
How to Export Outlook Contacts From a PST to vCard (VCF)
Rescue the address book from an old Outlook PST file and get it onto your iPhone, Android, Gmail or any contacts app as a single VCF file. No Outlook needed.
- EML Viewer
Viewers2 min read
How to Open an EML File Without Outlook or a Mail App
Read .eml emails in your browser: sender, recipients, date, the formatted message and attachments. Remote images are blocked for privacy, nothing is uploaded.
- PDFJPG
PDF2 min read
How to Convert PDF to JPG (Every Page as an Image)
Turn PDF pages into JPG images for social posts, slides or quick previews. Choose standard, high or print resolution, and get one image per page.
- VideoGIF
Audio & video2 min read
How to Make a GIF From a Video (Without the Huge File Size)
Turn an MP4, MOV or WebM clip into an animated GIF. Choose the frame rate, width and length to get a smooth GIF that's still small enough to share. Private.
- OLMPDF
Email2 min read
How to Convert an Outlook for Mac OLM Archive to PDF
Open an Outlook for Mac .olm export on any computer and save its emails as one PDF, each message on a new page with a clear header. No Outlook needed.
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