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Best File Conversion Apps for iPhone (2026)
Acrobat Reader: PDF Editor is the top-ranked of 40 file conversion apps on iPhone, at S tier with 4.6/5 from 661,280 ratings.
- 1
Free + IAP · ★ 4.6 · 661,280 ratings · score 98 - 2
Free + IAP · ★ 4.7 · 24,474 ratings · score 94 - 3
Free + IAP · ★ 4.8 · 13,697 ratings · score 92 - 4
Free + IAP · ★ 4.7 · 8,129 ratings · score 92 - 5
Free + IAP · ★ 4.7 · 33,294 ratings · score 89
What belongs in this list
Change a file from one format to another, such as an image, video, audio or document, so it opens where needed.
Not here: A single-format converter alone such as video to MP3 only, which belongs in a narrower category; A file transfer or sharing tool alone; A media editor alone with no format conversion; A general chatbot alone that is asked to convert files; A file viewer alone
More lists: Best Document Conversion Apps
How we pick
For this list we ask the App Store the same searches a person would, in several countries, and keep every app it returns. A model reads each app's listing and rejects the ones that only mention the use case. Every app that stays is scored out of 100 from four parts, each 0 to 100 and averaged with no weights: its App Store rating, how many people rated it, where the App Store itself ranks it for this list's searches, and how recently its current version shipped. An app showing Apple's Editors' Choice badge gets a fifth part of 100, which can only lift its score. Tiers follow fixed score bands: S from 90, A from 80, B from 70, C from 60, D from 50, F below. The list's leader is S if it scores 80 or more. On a list of 20 or more ranked apps, a tier from S to D takes in new apps only up to a quarter of the top 40: an app pushed out of a full tier falls to the next tier with room, and F takes the rest. An app already in a tier keeps its place while the tier is at most 2 apps over a quarter; past that, only the apps over that margin go down, lowest score first. Equal scores share a tier, and no app has a better tier than an app ranked above it. An app keeps its tier until its score passes the band edge by more than 1 point, or a full tier or the order above moves it. Only the top 40 of a list get a tier. Read the full method →
Compare every app
- 1Free + IAP · ★ 4.6 · 661,280 ratings · score 98 · best in class
- 2Free + IAP · ★ 4.7 · 24,474 ratings · score 94 · best in class
- 3Free + IAP · ★ 4.8 · 13,697 ratings · score 92 · best in class
- 4Free + IAP · ★ 4.7 · 8,129 ratings · score 92 · best in class
- 5Free + IAP · ★ 4.7 · 33,294 ratings · score 89 · excellent
- 6
Free + IAP · ★ 4.8 · 52,025 ratings · score 89 · excellent - 7
Free + IAP · ★ 4.8 · 1,399 ratings · score 88 · excellent - 8
Free + IAP · ★ 4.6 · 449 ratings · score 88 · excellent - 9
Free + IAP · ★ 4.9 · 67,951 ratings · score 87 · excellent - 10
Free + IAP · ★ 4.7 · 925 ratings · score 87 · excellent - 11
Free + IAP · ★ 4.5 · 3,744 ratings · score 85 · excellent - 12
Free + IAP · ★ 4.7 · 5,957 ratings · score 85 · excellent - 13
Free + IAP · ★ 4.4 · 5,994 ratings · score 85 · excellent - 14
Free + IAP · ★ 4.6 · 7,575 ratings · score 85 · excellent - 15
Free + IAP · ★ 4.8 · 7,523 ratings · score 84 · excellent - 16
Free download · ★ 4.6 · 4,847 ratings · score 76 · good - 17
Free + IAP · ★ 4.5 · 393 ratings · score 76 · good - 18
Free + IAP · ★ 4.7 · 369 ratings · score 76 · good - 19
Free + IAP · ★ 4.6 · 1,228 ratings · score 75 · good - 20
Free + IAP · ★ n/a · 0 ratings · score 72 · good · provisional - 21
Free + IAP · ★ 4.2 · 184 ratings · score 70 · good - 22
Free + IAP · ★ 4.5 · 62 ratings · score 68 · situational - 23
Free + IAP · ★ 4.4 · 1,703 ratings · score 63 · situational · provisional - 24
Free + IAP · ★ 4.5 · 543 ratings · score 62 · situational · provisional - 25
Free + IAP · ★ 4.7 · 39 ratings · score 62 · situational · provisional - 26
Free + IAP · ★ 5.0 · 1 ratings · score 62 · situational · provisional - 27
Free + IAP · ★ 4.8 · 22 ratings · score 62 · situational · provisional - 28
Free + IAP · ★ 4.4 · 18 ratings · score 61 · situational · provisional - 29
Free + IAP · ★ 5.0 · 3 ratings · score 61 · situational · provisional - 30
Free + IAP · ★ 4.8 · 8 ratings · score 61 · situational · provisional - 31
Free + IAP · ★ 5.0 · 3 ratings · score 60 · situational · provisional - 32
Free · ★ n/a · 0 ratings · score 60 · weak · provisional - 33
Free download · ★ 4.5 · 2,466 ratings · score 58 · weak · provisional - 34
Free + IAP · ★ 5.0 · 1 ratings · score 58 · weak · provisional - 35
Free + IAP · ★ 4.5 · 17,682 ratings · score 58 · weak - 36
Free + IAP · ★ 4.8 · 147 ratings · score 55 · weak - 37
Free + IAP · ★ 3.2 · 9 ratings · score 55 · weak - 38
Free + IAP · ★ 4.8 · 140 ratings · score 51 · weak · provisional - 39
Free · ★ 4.8 · 12,036 ratings · score 48 · avoid · provisional - 40
Free + IAP · ★ 4.2 · 34 ratings · score 44 · avoid · provisional
Beyond the top 40
New in the last 30 days
- Media Converter - video to mp3 (S)
- PDF Photos (S)
- PDF Editor-Converter & Viewer (A)
- The Document Converter (A)
- PDFelement: PDF Editor, Viewer (A)
- MobiPDF・PDF Text Editor・Reader (A)
- The Vector Converter (B)
- PDF Maker: Editor & Converter (B)
- PDF Maker - Convert to PDF (B)
- PDF Converter: Sign & Edit (B)
- PDF Converter ‧ (B)
- PDF Reader & Editor | Xodo (C)
- Word to PDF Converter: PDF Pro (C)
- PDFr: PDF Editor / Converter (C)
- PDF Manager: Editor & Scanner (C)
- PDF Scanner: Photo to Document (C)
- The Ebook Converter (D)
- PDF Converter (D)
- PDF Converter ™ > Photo to PDF (D)
- Converter PDF - Photo Reader (D)
- PDF Converter: PDF Compressor (D)
Questions people ask
- What is the best file conversion app for iPhone?
- Acrobat Reader: PDF Editor, S tier, ranked #1 of 40, rated 4.6 by 661,280 people.
- Which file conversion apps are free?
- 40 of 40 are free to download: Acrobat Reader: PDF Editor (S), Media Converter - video to mp3 (S), PDF Photos (S), PDF Editor: Read Scan Convert (S) and more. 36 of them sell in-app purchases. 2 report no in-app purchases.
- Which file conversion app has the best App Store rating?
- Photos PDF : Scanner Converter at 4.9 from 67,951 ratings.
- How many file conversion apps reach S or A tier?
- 15 of 40. Tiers follow fixed score bands: S from 90, A from 80, B from 70, C from 60, D from 50, F below. The list's leader is S if it scores 80 or more. On a list of 20 or more ranked apps, a tier from S to D takes in new apps only up to a quarter of the top 40: an app pushed out of a full tier falls to the next tier with room, and F takes the rest. An app already in a tier keeps its place while the tier is at most 2 apps over a quarter; past that, only the apps over that margin go down, lowest score first. Equal scores share a tier, and no app has a better tier than an app ranked above it. An app keeps its tier until its score passes the band edge by more than 1 point, or a full tier or the order above moves it. Only the top 40 of a list get a tier.
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