Every feature is free for 21 days. Afterwards, address normalization plus envelope printing stay usable; barcode printing can be unlocked with a one-time purchase.
EnvelopeCoder prints addressed envelopes with USPS barcodes from one window. Type or paste an address, pick an envelope size, and print.
BARCODES
Print Intelligent Mail barcodes (IMb) with ZIP+4 and delivery point routing, or POSTNET barcodes. Either format prints in the address block, or at the lower right with a FIM A pattern for courtesy reply designs. Both encoders verify themselves against official USPS test vectors at every launch.
TEN ENVELOPE SIZES
US Commercial #10, #9, Monarch, and #6¾; US Announcement A9, A7, and A2; International DL, C6, and C5. The preview is true to scale, and the most appropriate paper size in the printer is set automatically by the application.
ADDRESS NORMALIZATION (OPTIONAL)
One click standardizes a recipient address to USPS-standard formatting and adds ZIP+4, carrier route, and delivery point information. Normalization uses Geocodio, a third-party geocoding service, with your own free Geocodio account and API key; lookups happen only when you ask.
EVERYTHING ELSE
Search Contacts for recipients. Save styled return addresses. Reprint from the printed-envelope history. Undo a normalization. Calibrate for your printer. Built-in help covers all of it.
PRIVACY
Your addresses stay on your Mac. No analytics, no telemetry, no accounts, no ads. The only network traffic is the address lookup you explicitly request, sent to Geocodio under your own account.
FREE TRIAL AND PRICING
Every feature is free for 21 days. After the trial, envelope and address printing stay free forever, and normalization stays free with your own Geocodio key. Barcode printing unlocks with a single one-time purchase. One purchase covers your whole Family Sharing group. Please test with your own printer during the trial: printing is free before and after, so you can confirm your printer and envelope stock get along before you pay. Tested on HP, Brother, and Xerox laser printers; printers and drivers vary.
LEGAL
EnvelopeCoder is not affiliated with, endorsed by, or sponsored by the United States Postal Service or Geocodio. USPS, Intelligent Mail, and POSTNET are trademarks of the United States Postal Service.
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Postal nerds — don’t miss this!
jeremybondsf
This is a great envelope-composing and printing app — plus it has some seriously sick features for postal nerds to geek out on. Many apps can generate the now-sunsetted POSTNET barcodes, but this is the only Mac app I’ve seen that can generate properly formatted Intelligent Mail barcodes, incorporating the delivery-point routing code, Mailer ID, and USPS Service Type Identifier (STID). It can also determine useful postal information such as carrier route data from the address.The included Help chronicles the painstaking degree to which this app was designed to produce both compliant and attractive output, making smart inferences where necessary and even preventing bad input from producing a compromised result.One little usage tip I can offer: since the app does not specifically provide a field for an ancillary service endorsement (e.g., "RETURN SERVICE REQUESTED"), there’s a simple workaround. Do this only after the return address has been validated. At the end of the return address, type two or three returns — enough to leave at least ¼ inch of clear space when printed — and then enter your endorsement, preferably in ALL CAPS. This places it directly below the return address, one of the USPS-prescribed locations for an ancillary service endorsement. Be sure there is at least ¼ inch of clear space above, below, and on both sides of the endorsement.I am so glad I stumbled across this app. There are plenty of other cool features, and since the author generously provides a 21-day trial with all features enabled, you can really put it through its paces before registering.And, seriously: READ THE HELP. For maximum pleasure. Especially if the words “ancillary service endorsement” make you just a little bit excited.
Developer Response
Thank you for the very generous review; it’s nice to know there are other postal nerds out there! Your workaround for adding an ancillary service endorsement is clever. I’ll add this as a supported option in a future version (Address Service Requested or Return Service Requested, placed automatically to USPS rules) and update the help files accordingly, noting that the former could trigger a USPS fee to the sender via a postage-due PS Form 3547. Thank you again. — Paul
This update adds Intelligent Mail courtesy reply envelopes, A9 envelopes, and a fix for printers that don't list every envelope size. Specifically added:
• Courtesy reply layout for Intelligent Mail: the barcode can now print in the lower-right clear zone with a FIM A, the same layout POSTNET already offered, for reply envelopes preaddressed back to you. The Endorsement pop-up is unavailable in the two courtesy reply layouts, since those envelopes come back to you.
• A9 envelopes (5¾ × 8¾ in) join the size list, per a user request.
• Support for envelope sizes your printer may not explicitly support. Many printer drivers handle only a few envelope sizes and mis-frame the rest; EnvelopeCoder detects this and works around the limitation.
• On launch, EnvelopeCoder detects an address on the clipboard and pastes it into the recipient field. A Settings switch turns this off if not desired.
• Added a File ▸ Print… menu item.
• Address fields are a little larger for easier reading.
• Other small tweaks and help refinements.
Version 1.2
The developer, Paul Hughes Jr, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More