Diffchecker vs NextDiff
Diffchecker
diffchecker.comNextDiff
tkosoft.comSide by side
| Figure | Diffchecker | NextDiff |
|---|---|---|
| Price from | $15/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | — |
| Linux | Yes | — |
| iOS | Yes | — |
| API | Yes | — |
| Plans published | 8 | 1 |
| Spec score · File Comparison Software | 9.2 (#1) | 7.0 (#27) |
| Document formats | Document comparison supports DOC, DOCX, PDF and PPTX, including PDF-to-Word comparisons, moved-content detection, formatting changes and OCR for scans. | Optional Apache Tika support extracts readable text for comparisons of formats including PDF, DOCX, XLSX, and PPTX. |
| Intended users | The site describes use cases for developers and engineers, writers and editors, and data and operations teams. | The maker describes its tools as designed to be simple for everyday users while offering depth and reliability for professionals. |
| Privacy | The website says browser comparisons run in the browser and are not published or shared unless saved and shared; Desktop comparisons run offline on the computer. | TkoSoft says its software runs on the user's machine and involves no telemetry, cloud accounts, or data collection. |
| Text comparison | The web tool provides side-by-side and unified views with synchronized scrolling and colored insertions and removals. | It displays text files side by side and highlights changed lines and changed text within lines. |
Plans
Diffchecker
- API BasicFree
- BasicFree
- Pro + Desktop$15 a month
- Diffchecker Legal$20 a month
- Enterprise$40 a month
- API Standard$99 a month
- API Business$299 a month
- API EnterprisePriced on request
In their own words
Diffchecker
Diffchecker compares text, code, and data in a browser or offline with its desktop app, highlighting additions, removals, and edits. Text comparisons can use side-by-side or unified views, adjustable precision, custom ignore rules, syntax highlighting, real-time editing, and change merging. Listed comparison options also include documents, images, spreadsheets, and folders, with features such as OCR, redlines, formula detection, and batch comparison. Basic is free, but some tools have monthly use limits: unified view and real-time editing each allow five tries, while character-level differences and merge changes each allow ten. Pro + Desktop costs $15 a month per user and includes offline comparisons with desktop apps for Windows, Mac, and Linux. Legal costs $20 a month per user and adds iManage integration and comparison-setting profiles. Enterprise costs $40 a month per user with annual billing, and includes SAML SSO, SCIM provisioning, and dedicated support. Browser comparisons stay in the browser unless saved and shared; Desktop comparisons run locally. The site states browser traffic is TLS-encrypted and its security program is ISO/IEC 27001 certified.
NextDiff
NextDiff is a free Windows utility for comparing files, text documents, source code, and folders. It places text files side by side, marking changed lines and changes inside lines. Folder comparisons include subfolders, reveal files found on only one side, and can identify the newer file. You can edit text in the comparison view, copy differences in either direction, and undo recent merge or editing actions. Comparison settings can ignore letter case, whitespace, leading or trailing spaces, and blank lines. Supported encodings include ANSI, ASCII, UTF-8, UTF-8 with BOM, and UTF-16. Optional Apache Tika support extracts readable text from PDF, DOCX, XLSX, and PPTX files for comparison. Version 2.2 is dated September 23, 2026. NextDiff is freeware for personal and commercial use on Windows 10 and 11, with direct installer links and no account or email requirement.