Background: Binge eating disorder (BED) is associated with significant psychological distress and comorbidity, and access to evidence-based psychotherapy remains limited in many settings.

Objective: This uncontrolled pilot pre-post study primarily evaluated the feasibility and acceptability of a 30-day Brief Online-Oriented Self-guided CBT-E program (BOOST), and secondarily explored pre-post changes in eating-disorder psychopathology, self-esteem, depressive symptoms, and BMI.

Methods: Adults with clinically significant binge eating symptoms (BES  > = 18) completed an online screening questionnaire. Of 205 individuals screened, 53 were eligible, 28 started BOOST, and 21 completed baseline and post-intervention assessments (EDE-Q, RSE, BDI-II, BMI). BOOST content was delivered remotely via email and WhatsApp over 30 days. Acceptability was assessed using a 0–10 satisfaction rating.

Results: Among completers (n = 21), EDE-Q global score decreased (p = 0.012), as did shape concern (p = 0.011) and weight concern (p = 0.022); self-esteem increased (p = 0.013). No statistically significant changes were observed in dietary restraint, food concern, depressive symptoms (p = 0.190), or BMI (p = 0.660). Mean satisfaction was 6.7/10.

Conclusion: BOOST appeared feasible and acceptable as a brief, fully remote self-guided intervention. Findings suggest a preliminary signal of improvement in eating-disorder psychopathology and self-esteem over 30 days; controlled studies with diagnostic confirmation and longer follow-up are needed to establish efficacy.