Lindahl, 33, who has been with Chelsea since December 2014, won Olympic silver with her country in Rio in 2016.
She helped the Blues win a domestic double in 2015, with their first league title following Women's FA Cup success.
"She is probably the best goalkeeper in the world on current form," manager Emma Hayes told the club website.
"We're really looking for continuity and stability with our squad as we look to challenge for honours, especially in European competition."

Notts will drop into Division Two next season after losing their penultimate fixture to leaders Middlesex.
Newell, who will hand first-team duties to ex-England coach Peter Moores, told BBC Radio Nottingham relegation in cricket is "about the shame".
"It's about the embarrassment of getting relegated," Newell added.
"Financially it is not like losing your place in the Premier League in football. Financially it doesn't make a huge difference; it makes a difference to the supporters.
"It is more about the impact it has on the ego of the players and the impact on the supporters who are used to seeing Division One cricket.
"We are proud club; we have been in Division One for a long time and it's ten years since I stood here and had to explain away a relegation."
Notts have only won once in the Championship this season and now return to Division Two for the first time in nine years.

Zabair Hussain, 41, was discovered with multiple injuries to his head and body in Staniforth Road, Darnall, Sheffield, at about 23:20 GMT. He later died at the scene.
The 28-year-old arrested man has been taken into police custody.
Officers believe a number of men were involved in an assault and have appealed for witnesses to come forward.
Det Ch Insp Steve Handley, from South Yorkshire Police, said: "We are still in the very early stages of the investigation and we're carrying out numerous enquiries to get to the bottom of what happened - from reviewing CCTV footage to speaking to potential witnesses.
"While I understand that incidents like this are worrying for those living locally, we have increased patrols by neighbourhood officers to reassure residents."

Toby Ricketts and Marianna Fenn tied the "noodle knot" in the New Zealand South Island town of Akaroa.
The happy couple say that guidelines of the Pastafarian religion stipulate that wedding celebrants must be pirates.
Members of the church profess the belief that the world was created by an airborne spaghetti and meatballs-based being and humans evolved from pirates.
New Zealand officials last month designated the religion as an officially-recognised faith, allowing Wellington-based Pastafarian Karen Martyn the legal right to conduct marriages.
She carried out her inaugural wedding as an ordained "ministeroni" on Saturday.
More weddings are planned, she said, including same-sex unions that were legalised in New Zealand in 2013.
"I've had people from Russia, from Germany, from Denmark, from all over  contacting me and wanting me to marry them in the church because of our  non-discriminatory philosophy," she said.
"We will marry any consenting legal adults who meet the legal requirement."
Sweden international goalkeeper Hedvig Lindahl has signed an extended contract with Women's Super League One club Chelsea Ladies until 2019.
[NEXT_CONCEPT]
Nottinghamshire's relegation from the County Championship's top flight is "embarrassing", according to director of cricket Mick Newell.
[NEXT_CONCEPT]
A man has been arrested on suspicion of murder after another man's body was found in a street on New Year's Eve.
[NEXT_CONCEPT]
The light-hearted Church of the Flying Spaghetti Monster has staged its first legally recognised wedding.