What is Sauce for Strava?
Sauce for Strava is a browser extension that rewrites Strava's own pages in place. Install it and the activity page you already look at gains peak-effort tables, extra fields, export buttons and a physics calculator. No second website, no sync wait, nothing to open.
It's the work of one person: Justin Mayfield has written all but a handful of the commits in the public repo, which is MIT-licensed and still being pushed to. Everything essential is free; a Patreon at $2 a month unlocks a small set of bonus features.
Key Features
Peak tables for more than power
Strava shows you peak power. Sauce adds peak tables for normalized power, xPower, pace including grade-adjusted pace, heart rate, cadence and VAM, and if it knows your weight it estimates running power too. Each row expands into the effort behind it.
The analysis page, unlocked
Sauce adds fields to Strava's analysis page and exposes the raw data values underneath it. For runs and swims it un-hides that page entirely, so you can do the same interval-level digging on a swim that Strava normally reserves for rides.
Live segment files for Garmin, from any activity
The unusual one. Sauce will build a Garmin live segment file from any activity by any athlete, including downhill segments, which Strava's own live segments won't do. It's one of the Patreon bonus features: without a membership you get three trial uses, and none in Safari.
Perf Predictor
A full physics model of a cycling effort. Take any segment or slice of an activity and ask what power and what body weight produced that speed. Then ask what happens if you add 20 watts or drop 2 kg. It works on time trials, climbs and descents.
Export anything
TCX, GPX or FIT export on any activity, not only your own.
Comments and settable FTP
Sauce puts the activity's comments inline on the page, where Strava leaves dead space. It also lets you set FTP and weight by hand, which turns on watts-per-kilo stats for activities where Strava doesn't have those numbers.
Who It's For
- People who read every activity page anyway and would rather the numbers were already there than open a second site
- Cyclists with power meters, who get NP, xPower and the peak tables Strava keeps to itself
- Runners, for grade-adjusted pace and an analysis page that isn't hidden
- Anyone chasing a specific segment, thanks to Perf Predictor, and to the Garmin live segment files for patrons
- Swimmers, who get the analysis page at all
Why It Works
Every other Strava analytics tool asks you to go somewhere else, wait for a sync, and learn a second interface. Sauce edits the page you were already looking at. The catch is the flip side of that: it's a browser extension living inside someone else's site, so when Strava changes its markup, Sauce breaks until it's patched. That has happened, and it gets fixed quickly, but it's the deal you're making.
Is Sauce for Strava free?
The extension is free, MIT-licensed and ad-free. Bonus features sit behind a Patreon, starting at $2 a month as a Sauce Member: Garmin live segment creation, Sauce Performance for tracking fitness and performance records, athlete weight over time, extra themes, and access to Sauce for Zwift. A $5 Sauce Star gets the same, plus your name in the extension and on the supporters page. The rest of the extension works without paying.
Which browsers does Sauce support?
Chrome, Firefox, Edge and Safari. On Chromium browsers it installs from the Chrome Web Store, on Firefox from Add-ons, and on Apple platforms it comes as a free app from the App Store that carries the Safari extension.
Does Sauce work on my phone?
Not inside Strava's own iPhone or Android app. Nothing can modify that. But there is a free Sauce app on the App Store that installs a Safari extension for iPhone, iPad and Mac, so Strava viewed in Safari on a phone does get the Sauce treatment. Worth knowing that the Safari build has historically trailed the Chrome and Firefox ones; it was updated to Manifest v3 in July 2026, but if a feature you want is missing, that's usually why.
What data does Sauce add to Strava?
Peak tables for normalized power, xPower, pace and grade-adjusted pace, heart rate, cadence and VAM; extended statistics for whatever range you select on a chart; extra fields and the raw values on the analysis page; inline comments; and export buttons. How much of that shows up depends on what the activity actually recorded (no power meter, no power tables) and on whether Sauce knows your weight, which you can type in yourself.
