Hundreds of people queued from the early hours outside UK shops selling the latest edition of French satirical magazine Charlie Hebdo.
It comes as around 10 people have been arrested and questioned over the "possible logistical support" they may have provided three gunmen who carried out last week's attacks in Paris, Agence France-Presse reports.
French interior minister Bernard Cazeneuve has said tomorrow's rally to celebrate "freedom and tolerance" among the people of Paris after three days of terror will be an exceptional display of residents paying their respects to the 17 who have died.
He said: "It should be exceptional for various reasons, first and foremost because of the symbolic value of this gathering because it will be paying respect to the 17 people who have died since last Wednesday.
"At the end of an extraordinarily violent sequence French people will also pay respect to the journalists and the team at Charlie Hebdo, the police forces who died in their duty, of the hostages executed by their kidnappers and for those who displayed anti-semitic hatred."
He said several hundred of thousands of people were expected in the streets of Paris and said their safety would be assured by 24 units of public order forces lining the route and the presence of elite marksmen providing protection from above.
About 7,000 French Jewish people left the country last year and have moved to Israel because they did not feel safe.
The aunt of a man killed while trying to overpower gunman Amedy Coulibaly has told ITV News her family is fearful of their future in France.
A Muslim cleric in Pakistan has held a ceremony to honour Cherif and Said Kouachi, the two men suspected of the Charlie Hebdo massacre.