Of every service in this area, translation is the one where "online" changes least. A translation needs no witnessing. Nobody has to watch you sign, check your face against a passport or handle your original. A translator works from a clear image of the document, and that image can come from anywhere.
So the useful questions are not "can it be done online?" but "is the online translator the right kind for the body receiving it?" and "in what form will the finished translation be accepted?" This page covers those. For remote notarial appointments generally, see Online Notarisation in Australia.
For documents going to Australian bodies, the credential that usually matters is certification by NAATI, the national body that credentials translators and interpreters. Translations for Australian immigration done in Australia should be by a NAATI-credentialled translator. Other Australian agencies, universities and courts commonly expect the same, though each sets its own requirement.
When you are buying online, you cannot see a certificate on an office wall, so check three things yourself:
For documents going overseas, the rule is different: the receiving jurisdiction decides whose translation it accepts. Some require a translator on their own official register, in which case an Australian online translation may be refused however well certified. Ask first.
An online translation is usually delivered as a PDF bearing the translator's statement, signature and stamp or credential details. For many Australian online portals that is exactly what is needed: you upload it alongside the scan of the original.
Some receiving bodies want something else:
Ask the receiving body which form it wants before you order. If it wants paper, allow for postage — that becomes the longest step, not the translation.
A certified translation confirms that the translation is a true and accurate rendering of the document the translator was given. It does not confirm that the source document is genuine. When you send a scan, the translator is translating a scan.
That is usually fine, because the receiving body checks authenticity another way — by seeing the original, a certified copy, or an apostille on it. But if the body needs the translation tied to an authenticated document, the order matters.
Some foreign authorities want the translation itself notarised. It is worth knowing what that means before you book, because it changes who has to attend.
A notary does not usually check the translation's accuracy. What the notary typically does is witness the translator's signed declaration or affidavit that the translation is accurate, or certify a copy of the translation. The person who has to appear before the notary is the translator, not you. Some translation providers arrange this; ask whether yours does.
If that notarial step is proposed by video, the same test applies as for any remote act: the receiving authority, not Australian law, decides whether it will accept a remotely executed notarisation. An apostille, if needed, then comes from DFAT — see Online Apostille in Australia.
You will often be sending a passport, birth certificate or marriage certificate to someone you have never met. Reasonable precautions:
Does an online translation need to be witnessed? No. Translation is not a witnessed act. Witnessing only arises if the receiving body wants the translator's declaration notarised.
Can I use a machine translation, or an app that says "certified"? Not for official purposes. The certification means a credentialled person takes responsibility for the translation. Software cannot.
Is a NAATI translator overseas acceptable in Australia? The credential is what Australian bodies usually look for, not where the translator lives. Confirm with the receiving body.
Can a relative who speaks the language translate it? Not for official purposes. Receiving bodies expect an independent, credentialled translator.