A packing list that knows what your pack weighs. Free, works offline, no account — here is the whole idea in two minutes.
Type into the box at the top. Suggestions appear as you type — first your own gear from other trips, then a catalog of hundreds of real products with sourced manufacturer weights, shown with a tilde (~1.85 kg) because a published spec is an estimate until you weigh your own copy. Pick one and the name and weight fill in; type over the weight any time to correct it. You can also paste a product URL and Tumpline tries to fetch the weight from the page, or just type free-form: Sleeping quilt 620g and Rain jacket 13 oz both parse, pounds-and-ounces included.
An item has a name and an optional description, the LighterPack way: the name is the role (“Backpack”, “Quilt”) and the description is the product (“Osprey Kestrel 38”). Use one or both. When you pick a catalog suggestion, what you typed decides where the product lands: type part of the product (“kestrel”) and it becomes the name; type a role (“backpack”, “rain jacket”) and the role stays as the name with the product underneath. Backpack - kestrel in the add box does the split explicitly, and the description box in an item’s details takes suggestions too.
Every category has its own + Add to… row too, with suggestions filtered to that category — add from the Footwear row and you will not be offered tents. The weight box on a row is the total for that line: if it says ×2, enter what both weigh together.
So the catalog can learn what it is missing, an item you add by typing (without picking a suggestion) that the catalog has no match for is counted — just the words of the name and the product links given to the weight lookup, never who searched, never anything else from your lists.
Mark items with the little chips: W means worn (boots on your feet, hat on your head) and C means consumable (food, fuel, water). Tumpline then splits your total three ways: base weight is the permanent gear in the pack; pack weight is base plus consumables — what you actually lift; worn rides on your body and stays out of both. Items you decide not to bring can be skipped without deleting them. And for the load that is neither in the pack nor on your body — a canoe on a portage, a bike, a winter sled — mark its whole category as carried separately (the scales button in the category header): it keeps its weights but stays out of the pack totals. Tap any weight badge to see how base weights are classed, from Traditional to Superultralight — and read How to weigh your gear for why your kitchen scale beats every spec sheet.
Every trip can carry a short description (menu → Trip description): what the trip is, what is deliberately left out, what you are still deciding. It shows on the summary, in shared views and exports, and in the gallery. It takes simple Markdown — **bold**, *italic*, - lists, ## headings, links — and bare URLs become clickable links.
Check items off as they go in the pack; the progress bar tracks you. When the list itself is settled, tap the padlock to lock the trip — only the checkboxes stay active, so nothing gets renamed or deleted by a sleepy thumb at 5 a.m. The menu has an undo for the last change and a clear-all-packed for the next trip with the same list.
The trip chooser at the top holds every trip; type in it to search. Done with a trip? Archive it (the box icon on its row) — it leaves the everyday list but keeps everything: an archived trip still feeds your gear locker and suggestions, still stands as a record of what you carried, and one tap under “Archived” brings it back. Delete is the permanent one — the trip and its items are gone for good, and if the trip was shared, deleting warns you first and takes its share links down too. Rule of thumb: archive when the trip is over, delete when it should never have existed.
No accounts. Instead, a sync code (it looks like TUMP-XXXX-XXXX) is the key to your lists: create one on your first device, enter it on your second (or scan the QR code), and every device holding the code stays current — edits merge item by item, so phone and desktop can both change things, even offline, and reconcile cleanly when back online. Anyone who has your sync code can edit your lists, so treat it like a house key. Deleting the synced copy on the server is one tap; your lists stay on your devices. And to walk away from a device entirely — a borrowed phone, one you are selling — Erase this device in the trip menu removes every trip, the gear locker and all settings from that device only.
Sharing is separate from syncing, and read-only. A live view link shows one trip to anyone — it updates as you edit, shows only what you are bringing, and cannot be used to change anything or find your sync code. It is made for shakedown requests: the share menu also builds a forum-ready markdown summary with the link attached. Viewers can save their own copy to start from; copied items are kept apart from their own gear until they edit them, so borrowing a list never pollutes anyone's records.
You can also export any trip as an image for chat threads, or as a LighterPack-format CSV — and import the other way: paste any LighterPack share link (lighterpack.com/r/…) or choose an exported CSV, and the whole list arrives with weights, categories and worn / consumable tags intact. Tumpline asks whether it is your gear or someone else's, and treats it accordingly.
Proud of a list? The share menu can also suggest it for the starter-list gallery — a human reviews every suggestion, and accepted lists appear as frozen copies anyone can start from. There is no account to notify, so the app itself tells you what happened: the next time you open Tumpline after a decision, a small note says whether the list went in (and under which tag) or was passed over, with the reviewer's reason if there is one. The “Share a copy” dialog always shows the current standing. Once a list is in the gallery you can send an update (the gallery keeps the earlier version until the new one is approved) or withdraw it, which takes it down right away.
A share link can also be embedded in a blog or website — the copy-embed button sits next to each share link, and it looks like this:
The locker (in the menu) is everything you own across all trips, in one list. Fix a weight or add a product link there and the change applies everywhere that item appears. Editing inside a single trip offers the same courtesy in reverse: if the same item is in other trips, a small prompt asks whether to update those too — one tap, or ignore it. An item’s identity is its name plus its description, so when you edit either one the prompt matters: accept it and the item stays one item everywhere; skip it and the old version lives on in your other trips as a separate locker entry.
Two ways to make gear go away. Retire is for gear you sold or stopped using: it stays in every trip it was ever part of, but leaves suggestions and the everyday locker view. The Retired filter shows what is parked there and can bring anything back. Remove (✕) deletes the item from every trip, past ones included; the confirm tells you how many before it does.
Cataloguing gear with no trip in mind — a garage weigh-in with the scale out? Make a trip for it (“Gear inventory”), add everything with real weights, then archive it. The trip list stays tidy, and every item is in your locker and suggestions from then on.
There is no account, so your sync code is your way back. Create one (menu → share → Sync across devices) and get a copy of it off your phone: the sync dialog can send the recovery link to yourself through your own email or notes app, or save a small recovery file. On a new device, open that link — or enter the code — and every list returns exactly as you left it. JSON backups made from the share menu carry the sync code too, so restoring a backup reconnects everything in one step.
What the server keeps and what it never sees is spelled out on the privacy page.
Plain honesty: if your lists have never left one phone — no sync code, no backup — and that phone is gone, so are the lists. Tumpline will remind you once when your lists grow; take the ten seconds.
Tumpline follows your device’s light or dark setting; to pin it either way, tap the sun / moon button in the header — it cycles Auto → Light → Dark, the choice sticks on that device, and it applies to these guide pages too.
Everything lives in your browser first — the site works with no connection at all, and syncs when you are back. On a phone you can add it to your home screen for an app-like feel. One iOS quirk to know: the home-screen version keeps its own separate storage, so after installing it, enter your sync code once inside it to bring your lists over.